Section 1: Introduction |
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What is Physics? |
7:38 |
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Intro |
0:00 | |
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Objectives |
0:12 | |
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What is Physics? |
0:31 | |
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| What is Matter, Energy, and How to They Interact |
0:55 | |
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Why? |
0:58 | |
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| Physics Answers the 'Why' Questions. |
1:05 | |
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Matter |
1:23 | |
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| Matter |
1:29 | |
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| Mass |
1:33 | |
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| Inertial Mass |
1:53 | |
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| Gravitational Mass |
2:12 | |
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A Spacecraft's Mass |
2:58 | |
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Energy |
3:37 | |
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| Energy: The Ability or Capacity to Do Work |
3:39 | |
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| Work: The Process of Moving an Object |
3:45 | |
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| The Ability or Capacity to Move an Object |
3:54 | |
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Mass-Energy Equivalence |
4:51 | |
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| Relationship Between Mass and Energy E=mc2 |
5:01 | |
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| The Mass of An Object is Really a Measure of Its Energy |
5:05 | |
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The Study of Everything |
5:42 | |
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Introductory Course |
6:19 | |
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Next Steps |
7:15 | |
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Math Review |
24:12 |
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Intro |
0:00 | |
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Outline |
0:10 | |
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Objectives |
0:28 | |
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Why Do We Need Units? |
0:52 | |
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| Need to Set Specific Standards for Our Measurements |
1:01 | |
| |
| Physicists Have Agreed to Use the Systeme International |
1:24 | |
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The Systeme International |
1:50 | |
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| Based on Powers of 10 |
1:52 | |
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| 7 Fundamental Units: Meter, Kilogram, Second, Ampere, Candela, Kelvin, Mole |
2:02 | |
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The Meter |
2:18 | |
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| Meter is a Measure of Length |
2:20 | |
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| Measurements Smaller than a Meter, Use: Centimeter, Millimeter, Micrometer, Nanometer |
2:25 | |
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| Measurements Larger Than a Meter, Use Kilometer |
2:38 | |
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The Kilogram |
2:46 | |
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| Roughly Equivalent to 2.2 English Pounds |
2:49 | |
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| Grams, Milligrams |
2:53 | |
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| Megagram |
2:59 | |
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Seconds |
3:10 | |
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| Base Unit of Time |
3:12 | |
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| Minute, Hour, Day |
3:20 | |
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| Milliseconds, Microseconds |
3:33 | |
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Derived Units |
3:41 | |
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| Velocity |
3:45 | |
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| Acceleration |
3:57 | |
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| Force |
4:04 | |
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Prefixes for Powers of 10 |
4:21 | |
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Converting Fundamental Units, Example 1 |
4:53 | |
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Converting Fundamental Units, Example 2 |
7:18 | |
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Two-Step Conversions, Example 1 |
8:24 | |
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Two-Step Conversions, Example 2 |
10:06 | |
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Derived Unit Conversions |
11:29 | |
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Multi-Step Conversions |
13:25 | |
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Metric Estimations |
15:04 | |
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What are Significant Figures? |
16:01 | |
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| Represent a Manner of Showing Which Digits In a Number Are Known to Some Level of Certainty |
16:03 | |
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| Example |
16:09 | |
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Measuring with Sig Figs |
16:36 | |
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| Rule 1 |
16:40 | |
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| Rule 2 |
16:44 | |
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| Rule 3 |
16:52 | |
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Reading Significant Figures |
16:57 | |
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| All Non-Zero Digits Are Significant |
17:04 | |
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| All Digits Between Non-Zero Digits Are Significant |
17:07 | |
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| Zeros to the Left of the Significant Digits |
17:11 | |
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| Zeros to the Right of the Significant Digits |
17:16 | |
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Non-Zero Digits |
17:21 | |
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Digits Between Non-Zeros Are Significant |
17:45 | |
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Zeroes to the Right of the Sig Figs Are Significant |
18:17 | |
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Why Scientific Notation? |
18:36 | |
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| Physical Measurements Vary Tremendously in Magnitude |
18:38 | |
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| Example |
18:47 | |
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Scientific Notation in Practice |
19:23 | |
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| Example 1 |
19:28 | |
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| Example 2 |
19:44 | |
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Using Scientific Notation |
20:02 | |
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| Show Your Value Using Correct Number of Significant Figures |
20:05 | |
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| Move the Decimal Point |
20:09 | |
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| Show Your Number Being Multiplied by 10 Raised to the Appropriate Power |
20:14 | |
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Accuracy and Precision |
20:23 | |
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| Accuracy |
20:36 | |
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| Precision |
20:41 | |
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Example 1: Scientific Notation w/ Sig Figs |
21:48 | |
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Example 2: Scientific Notation - Compress |
22:25 | |
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Example 3: Scientific Notation - Compress |
23:07 | |
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Example 4: Scientific Notation - Expand |
23:31 | |
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Vectors & Scalars |
25:05 |
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Intro |
0:00 | |
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Objectives |
0:05 | |
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Scalars |
0:29 | |
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| Definition of Scalar |
0:39 | |
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| Temperature, Mass, Time |
0:45 | |
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Vectors |
1:12 | |
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| Vectors are Quantities That Have Magnitude and Direction |
1:13 | |
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| Represented by Arrows |
1:31 | |
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Vector Representations |
1:47 | |
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Graphical Vector Addition |
2:42 | |
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Graphical Vector Subtraction |
4:58 | |
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Vector Components |
6:08 | |
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Angle of a Vector |
8:22 | |
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Vector Notation |
9:52 | |
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Example 1: Vector Components |
14:30 | |
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Example 2: Vector Components |
16:05 | |
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Example 3: Vector Magnitude |
17:26 | |
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Example 4: Vector Addition |
19:38 | |
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Example 5: Angle of a Vector |
24:06 | |
Section 2: Mechanics |
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Defining & Graphing Motion |
30:11 |
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Intro |
0:00 | |
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Objectives |
0:07 | |
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Position |
0:40 | |
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| An Object's Position Cab Be Assigned to a Variable on a Number Scale |
0:43 | |
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| Symbol for Position |
1:07 | |
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Distance |
1:13 | |
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| When Position Changes, An Object Has Traveled Some Distance |
1:14 | |
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| Distance is Scalar and Measured in Meters |
1:21 | |
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Example 1: Distance |
1:34 | |
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Displacement |
2:17 | |
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| Displacement is a Vector Which Describes the Straight Line From Start to End Point |
2:18 | |
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| Measured in Meters |
2:27 | |
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Example 2: Displacement |
2:39 | |
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Average Speed |
3:32 | |
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| The Distance Traveled Divided by the Time Interval |
3:33 | |
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| Speed is a Scalar |
3:47 | |
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Example 3: Average Speed |
3:57 | |
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Average Velocity |
4:37 | |
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| The Displacement Divided by the Time Interval |
4:38 | |
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| Velocity is a Vector |
4:53 | |
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Example 4: Average Velocity |
5:06 | |
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Example 5: Chuck the Hungry Squirrel |
5:55 | |
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Acceleration |
8:02 | |
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| Rate At Which Velocity Changes |
8:13 | |
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| Acceleration is a Vector |
8:26 | |
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Example 6: Acceleration Problem |
8:52 | |
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Average vs. Instantaneous |
9:44 | |
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| Average Values Take Into Account an Entire Time Interval |
9:50 | |
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| Instantaneous Value Tells the Rate of Change of a Quantity at a Specific Instant in Time |
9:54 | |
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Example 7: Average Velocity |
10:06 | |
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Particle Diagrams |
11:57 | |
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| Similar to the Effect of Oil Leak from a Car on the Pavement |
11:59 | |
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| Accelerating |
13:03 | |
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Position-Time Graphs |
14:17 | |
| |
| Shows Position as a Function of Time |
14:24 | |
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Slope of x-t Graph |
15:08 | |
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| Slope Gives You the Velocity |
15:09 | |
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| Negative Indicates Direction |
16:27 | |
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Velocity-Time Graphs |
16:45 | |
| |
| Shows Velocity as a Function of Time |
16:49 | |
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Area Under v-t Graphs |
17:47 | |
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| Area Under the V-T Graph Gives You Change in Displacement |
17:48 | |
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Example 8: Slope of a v-t Graph |
19:45 | |
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Acceleration-Time Graphs |
21:44 | |
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| Slope of the v-t Graph Gives You Acceleration |
21:45 | |
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| Area Under the a-t Graph Gives You an Object's Change in Velocity |
22:24 | |
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Example 10: Motion Graphing |
24:03 | |
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Example 11: v-t Graph |
27:14 | |
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Example 12: Displacement From v-t Graph |
28:14 | |
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Kinematic Equations |
36:13 |
| |
Intro |
0:00 | |
| |
Objectives |
0:07 | |
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Problem-Solving Toolbox |
0:42 | |
| |
| Graphs Are Not Always the Most Effective |
0:47 | |
| |
| Kinematic Equations Helps us Solve for Five Key Variables |
0:56 | |
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Deriving the Kinematic Equations |
1:29 | |
| |
Kinematic Equations |
7:40 | |
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Problem Solving Steps |
8:13 | |
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| Label Your Horizontal or Vertical Motion |
8:20 | |
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| Choose a Direction as Positive |
8:24 | |
| |
| Create a Motion Analysis Table |
8:33 | |
| |
| Fill in Your Givens |
8:42 | |
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| Solve for Unknowns |
8:45 | |
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Example 1: Horizontal Kinematics |
8:51 | |
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Example 2: Vertical Kinematics |
11:13 | |
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Example 3: 2 Step Problem |
13:25 | |
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Example 4: Acceleration Problem |
16:44 | |
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Example 5: Particle Diagrams |
17:56 | |
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Example 6: Quadratic Solution |
20:13 | |
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Free Fall |
24:24 | |
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| When the Only Force Acting on an Object is the Force of Gravity, the Motion is Free Fall |
24:27 | |
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Air Resistance |
24:51 | |
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| Drop a Ball |
24:56 | |
| |
| Remove the Air from the Room |
25:02 | |
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| Analyze the Motion of Objects by Neglecting Air Resistance |
25:06 | |
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Acceleration Due to Gravity |
25:22 | |
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| g = 9.8 m/s2 |
25:25 | |
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| Approximate g as 10 m/s2 on the AP Exam |
25:37 | |
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| G is Referred to as the Gravitational Field Strength |
25:48 | |
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Objects Falling From Rest |
26:15 | |
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| Objects Starting from Rest Have an Initial velocity of 0 |
26:19 | |
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| Acceleration is +g |
26:34 | |
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Example 7: Falling Objects |
26:47 | |
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Objects Launched Upward |
27:59 | |
| |
| Acceleration is -g |
28:04 | |
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| At Highest Point, the Object has a Velocity of 0 |
28:19 | |
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| Symmetry of Motion |
28:27 | |
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Example 8: Ball Thrown Upward |
28:47 | |
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Example 9: Height of a Jump |
29:23 | |
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Example 10: Ball Thrown Downward |
33:08 | |
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Example 11: Maximum Height |
34:16 | |
|
Projectiles |
20:32 |
| |
Intro |
0:00 | |
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Objectives |
0:06 | |
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What is a Projectile? |
0:26 | |
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| An Object That is Acted Upon Only By Gravity |
0:29 | |
| |
| Typically Launched at an Angle |
0:43 | |
| |
Path of a Projectile |
1:03 | |
| |
| Projectiles Launched at an Angle Move in Parabolic Arcs |
1:06 | |
| |
| Symmetric and Parabolic |
1:32 | |
| |
| Horizontal Range and Max Height |
1:49 | |
| |
Independence of Motion |
2:17 | |
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| Vertical |
2:49 | |
| |
| Horizontal |
2:52 | |
| |
Example 1: Horizontal Launch |
3:49 | |
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Example 2: Parabolic Path |
7:41 | |
| |
Angled Projectiles |
8:30 | |
| |
| Must First Break Up the Object's Initial Velocity Into x- and y- Components of Initial Velocity |
8:32 | |
| |
| An Object Will Travel the Maximum Horizontal Distance with a Launch Angle of 45 Degrees |
8:43 | |
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Example 3: Human Cannonball |
8:55 | |
| |
Example 4: Motion Graphs |
12:55 | |
| |
Example 5: Launch From a Height |
15:33 | |
| |
Example 6: Acceleration of a Projectile |
19:56 | |
|
Relative Motion |
10:52 |
| |
Intro |
0:00 | |
| |
Objectives |
0:06 | |
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Reference Frames |
0:18 | |
| |
| Motion of an Observer |
0:21 | |
| |
| No Way to Distinguish Between Motion at Rest and Motion at a Constant Velocity |
0:44 | |
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Motion is Relative |
1:35 | |
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| Example 1 |
1:39 | |
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| Example 2 |
2:09 | |
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Calculating Relative Velocities |
2:31 | |
| |
| Example 1 |
2:43 | |
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| Example 2 |
2:48 | |
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| Example 3 |
2:52 | |
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Example 1 |
4:58 | |
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Example 2: Airspeed |
6:19 | |
| |
Example 3: 2-D Relative Motion |
7:39 | |
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Example 4: Relative Velocity with Direction |
9:40 | |
|
Newton's 1st Law of Motion |
10:16 |
| |
Intro |
0:00 | |
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Objective |
0:05 | |
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Newton's 1st Law of Motion |
0:16 | |
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| An Object At Rest Will Remain At Rest |
0:21 | |
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| An Object In Motion Will Remain in Motion |
0:26 | |
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| Net Force |
0:39 | |
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| Also Known As the Law of Inertia |
0:46 | |
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Force |
1:02 | |
| |
| Push or Pull |
1:04 | |
| |
| Newtons |
1:08 | |
| |
| Contact and Field Forces |
1:31 | |
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| Contact Forces |
1:50 | |
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| Field Forces |
2:11 | |
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What is a Net Force? |
2:30 | |
| |
| Vector Sum of All the Forces Acting on an Object |
2:33 | |
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| Translational Equilibrium |
2:37 | |
| |
| Unbalanced Force Is a Net Force |
2:46 | |
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What Does It Mean? |
3:49 | |
| |
| An Object Will Continue in Its Current State of Motion Unless an Unbalanced Force Acts Upon It |
3:50 | |
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| Example of Newton's First Law |
4:20 | |
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Objects in Motion |
5:05 | |
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| Will Remain in Motion At Constant Velocity |
5:06 | |
| |
| Hard to Find a Frictionless Environment on Earth |
5:10 | |
| |
Static Equilibrium |
5:40 | |
| |
| Net Force on an Object is 0 |
5:44 | |
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Inertia |
6:21 | |
| |
| Tendency of an Object to Resist a Change in Velocity |
6:23 | |
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| Inertial Mass |
6:35 | |
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| Gravitational Mass |
6:40 | |
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Example 1: Inertia |
7:10 | |
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Example 2: Inertia |
7:37 | |
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Example 3: Translational Equilibrium |
8:03 | |
| |
Example 4: Net Force |
8:40 | |
|
Newton's 2nd Law of Motion |
34:55 |
| |
Intro |
0:00 | |
| |
Objective |
0:07 | |
| |
Free Body Diagrams |
0:37 | |
| |
| Tools Used to Analyze Physical Situations |
0:40 | |
| |
| Show All the Forces Acting on a Single Object |
0:45 | |
| |
Drawing FBDs |
0:58 | |
| |
| Draw Object of Interest as a Dot |
1:00 | |
| |
| Sketch a Coordinate System |
1:10 | |
| |
Example 1: Falling Elephant |
1:18 | |
| |
Example 2: Falling Elephant with Air Resistance |
2:07 | |
| |
Example 3: Soda on Table |
3:00 | |
| |
Example 4: Box in Equilibrium |
4:25 | |
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Example 5: Block on a Ramp |
5:01 | |
| |
Pseudo-FBDs |
5:53 | |
| |
| Draw When Forces Don't Line Up with Axes |
5:56 | |
| |
| Break Forces That Dont Line Up with Axes into Components That Do |
6:00 | |
| |
Example 6: Objects on a Ramp |
6:32 | |
| |
Example 7: Car on a Banked Turn |
10:23 | |
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Newton's 2nd Law of Motion |
12:56 | |
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| The Acceleration of an Object is in the Direction of the Directly Proportional to the Net Force Applied |
13:06 | |
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Newton's 1st Two Laws Compared |
13:45 | |
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| Newton's 1st Law |
13:51 | |
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| Newton's 2nd Law |
14:10 | |
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Applying Newton's 2nd Law |
14:50 | |
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Example 8: Applying Newton's 2nd Law |
15:23 | |
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Example 9: Stopping a Baseball |
16:52 | |
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Example 10: Block on a Surface |
19:51 | |
| |
Example 11: Concurrent Forces |
21:16 | |
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Mass vs. Weight |
22:28 | |
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| Mass |
22:29 | |
| |
| Weight |
22:47 | |
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Example 12: Mass vs. Weight |
23:16 | |
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Translational Equilibrium |
24:47 | |
| |
| Occurs When There Is No Net Force on an Object |
24:49 | |
| |
| Equilibrant |
24:57 | |
| |
Example 13: Translational Equilibrium |
25:29 | |
| |
Example 14: Translational Equilibrium |
26:56 | |
| |
Example 15: Determining Acceleration |
28:05 | |
| |
Example 16: Suspended Mass |
31:03 | |
|
Newton's 3rd Law of Motion |
5:58 |
| |
Intro |
0:00 | |
| |
Objectives |
0:06 | |
| |
Newton's 3rd Law of Motion |
0:20 | |
| |
| All Forces Come in Pairs |
0:24 | |
| |
Examples |
1:22 | |
| |
Action-Reaction Pairs |
2:07 | |
| |
| Girl Kicking Soccer Ball |
2:11 | |
| |
| Rocket Ship in Space |
2:29 | |
| |
| Gravity on You |
2:53 | |
| |
Example 1: Force of Gravity |
3:34 | |
| |
Example 2: Sailboat |
4:00 | |
| |
Example 3: Hammer and Nail |
4:49 | |
| |
Example 4: Net Force |
5:06 | |
|
Friction |
17:49 |
| |
Intro |
0:00 | |
| |
Objectives |
0:06 | |
| |
Examples |
0:23 | |
| |
| Friction Opposes Motion |
0:24 | |
| |
| Kinetic Friction |
0:27 | |
| |
| Static Friction |
0:36 | |
| |
| Magnitude of Frictional Force Is Determined By Two Things |
0:41 | |
| |
Coefficient Friction |
2:27 | |
| |
| Ratio of the Frictional Force and the Normal Force |
2:28 | |
| |
| Chart of Different Values of Friction |
2:48 | |
| |
Kinetic or Static? |
3:31 | |
| |
Example 1: Car Sliding |
4:18 | |
| |
Example 2: Block on Incline |
5:03 | |
| |
Calculating the Force of Friction |
5:48 | |
| |
| Depends Only Upon the Nature of the Surfaces in Contact and the Magnitude of the Force |
5:50 | |
| |
Terminal Velocity |
6:14 | |
| |
| Air Resistance |
6:18 | |
| |
| Terminal Velocity of the Falling Object |
6:33 | |
| |
Example 3: Finding the Frictional Force |
7:36 | |
| |
Example 4: Box on Wood Surface |
9:13 | |
| |
Example 5: Static vs. Kinetic Friction |
11:49 | |
| |
Example 6: Drag Force on Airplane |
12:15 | |
| |
Example 7: Pulling a Sled |
13:21 | |
|
Dynamics Applications |
35:27 |
| |
Intro |
0:00 | |
| |
Objectives |
0:08 | |
| |
Free Body Diagrams |
0:49 | |
| |
Drawing FBDs |
1:09 | |
| |
| Draw Object of Interest as a Dot |
1:12 | |
| |
| Sketch a Coordinate System |
1:18 | |
| |
Example 1: FBD of Block on Ramp |
1:39 | |
| |
Pseudo-FBDs |
1:59 | |
| |
| Draw Object of Interest as a Dot |
2:00 | |
| |
| Break Up the Forces |
2:07 | |
| |
Box on a Ramp |
2:12 | |
| |
Example 2: Box at Rest |
4:28 | |
| |
Example 3: Box Held by Force |
5:00 | |
| |
What is an Atwood Machine? |
6:46 | |
| |
| Two Objects are Connected by a Light String Over a Mass-less Pulley |
6:49 | |
| |
Properties of Atwood Machines |
7:13 | |
| |
| Ideal Pulleys are Frictionless and Mass-less |
7:16 | |
| |
| Tension is Constant in a Light String Passing Over an Ideal Pulley |
7:23 | |
| |
Solving Atwood Machine Problems |
8:02 | |
| |
Alternate Solution |
12:07 | |
| |
| Analyze the System as a Whole |
12:12 | |
| |
Elevators |
14:24 | |
| |
| Scales Read the Force They Exert on an Object Placed Upon Them |
14:42 | |
| |
| Can be Used to Analyze Using Newton's 2nd Law and Free body Diagrams |
15:23 | |
| |
Example 4: Elevator Accelerates Upward |
15:36 | |
| |
Example 5: Truck on a Hill |
18:30 | |
| |
Example 6: Force Up a Ramp |
19:28 | |
| |
Example 7: Acceleration Down a Ramp |
21:56 | |
| |
Example 8: Basic Atwood Machine |
24:05 | |
| |
Example 9: Masses and Pulley on a Table |
26:47 | |
| |
Example 10: Mass and Pulley on a Ramp |
29:15 | |
| |
Example 11: Elevator Accelerating Downward |
33:00 | |
|
Impulse & Momentum |
26:06 |
| |
Intro |
0:00 | |
| |
Objectives |
0:06 | |
| |
Momentum |
0:31 | |
| |
| Example |
0:35 | |
| |
| Momentum measures How Hard It Is to Stop a Moving Object |
0:47 | |
| |
| Vector Quantity |
0:58 | |
| |
Example 1: Comparing Momenta |
1:48 | |
| |
Example 2: Calculating Momentum |
3:08 | |
| |
Example 3: Changing Momentum |
3:50 | |
| |
Impulse |
5:02 | |
| |
| Change In Momentum |
5:05 | |
| |
Example 4: Impulse |
5:26 | |
| |
Example 5: Impulse-Momentum |
6:41 | |
| |
Deriving the Impulse-Momentum Theorem |
9:04 | |
| |
Impulse-Momentum Theorem |
12:02 | |
| |
Example 6: Impulse-Momentum Theorem |
12:15 | |
| |
Non-Constant Forces |
13:55 | |
| |
| Impulse or Change in Momentum |
13:56 | |
| |
| Determine the Impulse by Calculating the Area of the Triangle Under the Curve |
14:07 | |
| |
Center of Mass |
14:56 | |
| |
| Real Objects Are More Complex Than Theoretical Particles |
14:59 | |
| |
| Treat Entire Object as if Its Entire Mass Were Contained at the Object's Center of Mass |
15:09 | |
| |
| To Calculate the Center of Mass |
15:17 | |
| |
Example 7: Force on a Moving Object |
15:49 | |
| |
Example 8: Motorcycle Accident |
17:49 | |
| |
Example 9: Auto Collision |
19:32 | |
| |
Example 10: Center of Mass (1D) |
21:29 | |
| |
Example 11: Center of Mass (2D) |
23:28 | |
|
Collisions |
21:59 |
| |
Intro |
0:00 | |
| |
Objectives |
0:09 | |
| |
Conservation of Momentum |
0:18 | |
| |
| Linear Momentum is Conserved in an Isolated System |
0:21 | |
| |
| Useful for Analyzing Collisions and Explosions |
0:27 | |
| |
Momentum Tables |
0:58 | |
| |
| Identify Objects in the System |
1:05 | |
| |
| Determine the Momenta of the Objects Before and After the Event |
1:10 | |
| |
| Add All the Momenta From Before the Event and Set Them Equal to Momenta After the Event |
1:15 | |
| |
| Solve Your Resulting Equation for Unknowns |
1:20 | |
| |
Types of Collisions |
1:31 | |
| |
| Elastic Collision |
1:36 | |
| |
| Inelastic Collision |
1:56 | |
| |
Example 1: Conservation of Momentum (1D) |
2:02 | |
| |
Example 2: Inelastic Collision |
5:12 | |
| |
Example 3: Recoil Velocity |
7:16 | |
| |
Example 4: Conservation of Momentum (2D) |
9:29 | |
| |
Example 5: Atomic Collision |
16:02 | |
|
Describing Circular Motion |
7:18 |
| |
Intro |
0:00 | |
| |
Objectives |
0:07 | |
| |
Uniform Circular Motion |
0:20 | |
| |
| Circumference |
0:32 | |
| |
| Average Speed Formula Still Applies |
0:46 | |
| |
Frequency |
1:03 | |
| |
| Number of Revolutions or Cycles Which Occur Each Second |
1:04 | |
| |
| Hertz |
1:24 | |
| |
| Formula for Frequency |
1:28 | |
| |
Period |
1:36 | |
| |
| Time It Takes for One Complete Revolution or Cycle |
1:37 | |
| |
Frequency and Period |
1:54 | |
| |
Example 1: Car on a Track |
2:08 | |
| |
Example 2: Race Car |
3:55 | |
| |
Example 3: Toy Train |
4:45 | |
| |
Example 4: Round-A-Bout |
5:39 | |
|
Centripetal Acceleration & Force |
26:37 |
| |
Intro |
0:00 | |
| |
Objectives |
0:08 | |
| |
Uniform Circular Motion |
0:38 | |
| |
Direction of ac |
1:41 | |
| |
Magnitude of ac |
3:50 | |
| |
Centripetal Force |
4:08 | |
| |
| For an Object to Accelerate, There Must Be a Net Force |
4:18 | |
| |
| Centripetal Force |
4:26 | |
| |
Calculating Centripetal Force |
6:14 | |
| |
Example 1: Acceleration |
7:31 | |
| |
Example 2: Direction of ac |
8:53 | |
| |
Example 3: Loss of Centripetal Force |
9:19 | |
| |
Example 4: Velocity and Centripetal Force |
10:08 | |
| |
Example 5: Demon Drop |
10:55 | |
| |
Example 6: Centripetal Acceleration vs. Speed |
14:11 | |
| |
Example 7: Calculating ac |
15:03 | |
| |
Example 8: Running Back |
15:45 | |
| |
Example 9: Car at an Intersection |
17:15 | |
| |
Example 10: Bucket in Horizontal Circle |
18:40 | |
| |
Example 11: Bucket in Vertical Circle |
19:20 | |
| |
Example 12: Frictionless Banked Curve |
21:55 | |
|
Gravitation |
32:56 |
| |
Intro |
0:00 | |
| |
Objectives |
0:08 | |
| |
Universal Gravitation |
0:29 | |
| |
| The Bigger the Mass the Closer the Attraction |
0:48 | |
| |
| Formula for Gravitational Force |
1:16 | |
| |
Calculating g |
2:43 | |
| |
| Mass of Earth |
2:51 | |
| |
| Radius of Earth |
2:55 | |
| |
Inverse Square Relationship |
4:32 | |
| |
Problem Solving Hints |
7:21 | |
| |
| Substitute Values in For Variables at the End of the Problem Only |
7:26 | |
| |
| Estimate the Order of Magnitude of the Answer Before Using Your Calculator |
7:38 | |
| |
| Make Sure Your Answer Makes Sense |
7:55 | |
| |
Example 1: Asteroids |
8:20 | |
| |
Example 2: Meteor and the Earth |
10:17 | |
| |
Example 3: Satellite |
13:13 | |
| |
Gravitational Fields |
13:50 | |
| |
| Gravity is a Non-Contact Force |
13:54 | |
| |
| Closer Objects |
14:14 | |
| |
| Denser Force Vectors |
14:19 | |
| |
Gravitational Field Strength |
15:09 | |
| |
Example 4: Astronaut |
16:19 | |
| |
Gravitational Potential Energy |
18:07 | |
| |
| Two Masses Separated by Distance Exhibit an Attractive Force |
18:11 | |
| |
| Formula for Gravitational Field |
19:21 | |
| |
How Do Orbits Work? |
19:36 | |
| |
Example5: Gravitational Field Strength for Space Shuttle in Orbit |
21:35 | |
| |
Example 6: Earth's Orbit |
25:13 | |
| |
Example 7: Bowling Balls |
27:25 | |
| |
Example 8: Freely Falling Object |
28:07 | |
| |
Example 9: Finding g |
28:40 | |
| |
Example 10: Space Vehicle on Mars |
29:10 | |
| |
Example 11: Fg vs. Mass Graph |
30:24 | |
| |
Example 12: Mass on Mars |
31:14 | |
| |
Example 13: Two Satellites |
31:51 | |
|
Rotational Kinematics |
15:33 |
| |
Intro |
0:00 | |
| |
Objectives |
0:07 | |
| |
Radians and Degrees |
0:26 | |
| |
| In Degrees, Once Around a Circle is 360 Degrees |
0:29 | |
| |
| In Radians, Once Around a Circle is 2π |
0:34 | |
| |
Example 1: Degrees to Radians |
0:57 | |
| |
Example 2: Radians to Degrees |
1:31 | |
| |
Linear vs. Angular Displacement |
2:00 | |
| |
| Linear Position |
2:05 | |
| |
| Angular Position |
2:10 | |
| |
Linear vs. Angular Velocity |
2:35 | |
| |
| Linear Speed |
2:39 | |
| |
| Angular Speed |
2:42 | |
| |
Direction of Angular Velocity |
3:05 | |
| |
Converting Linear to Angular Velocity |
4:22 | |
| |
Example 3: Angular Velocity Example |
4:41 | |
| |
Linear vs. Angular Acceleration |
5:36 | |
| |
Example 4: Angular Acceleration |
6:15 | |
| |
Kinematic Variable Parallels |
7:47 | |
| |
| Displacement |
7:52 | |
| |
| Velocity |
8:10 | |
| |
| Acceleration |
8:16 | |
| |
| Time |
8:22 | |
| |
Kinematic Variable Translations |
8:30 | |
| |
| Displacement |
8:34 | |
| |
| Velocity |
8:42 | |
| |
| Acceleration |
8:50 | |
| |
| Time |
8:58 | |
| |
Kinematic Equation Parallels |
9:09 | |
| |
| Kinematic Equations |
9:12 | |
| |
| Delta |
9:33 | |
| |
| Final Velocity Squared and Angular Velocity Squared |
9:54 | |
| |
Example 5: Medieval Flail |
10:24 | |
| |
Example 6: CD Player |
10:57 | |
| |
Example 7: Carousel |
12:13 | |
| |
Example 8: Circular Saw |
13:35 | |
|
Torque |
11:21 |
| |
Intro |
0:00 | |
| |
Objectives |
0:05 | |
| |
Torque |
0:18 | |
| |
| Force That Causes an Object to Turn |
0:22 | |
| |
| Must be Perpendicular to the Displacement to Cause a Rotation |
0:27 | |
| |
| Lever Arm: The Stronger the Force, The More Torque |
0:45 | |
| |
Direction of the Torque Vector |
1:53 | |
| |
| Perpendicular to the Position Vector and the Force Vector |
1:54 | |
| |
| Right-Hand Rule |
2:08 | |
| |
Newton's 2nd Law: Translational vs. Rotational |
2:46 | |
| |
Equilibrium |
3:58 | |
| |
| Static Equilibrium |
4:01 | |
| |
| Dynamic Equilibrium |
4:09 | |
| |
| Rotational Equilibrium |
4:22 | |
| |
Example 1: Pirate Captain |
4:32 | |
| |
Example 2: Auto Mechanic |
5:25 | |
| |
Example 3: Sign Post |
6:44 | |
| |
Example 4: See-Saw |
9:01 | |
|
Rotational Dynamics |
36:06 |
| |
Intro |
0:00 | |
| |
Objectives |
0:08 | |
| |
Types of Inertia |
0:39 | |
| |
| Inertial Mass (Translational Inertia) |
0:42 | |
| |
| Moment of Inertia (Rotational Inertia) |
0:53 | |
| |
Moment of Inertia for Common Objects |
1:48 | |
| |
Example 1: Calculating Moment of Inertia |
2:53 | |
| |
Newton's 2nd Law - Revisited |
5:09 | |
| |
| Acceleration of an Object |
5:15 | |
| |
| Angular Acceleration of an Object |
5:24 | |
| |
Example 2: Rotating Top |
5:47 | |
| |
Example 3: Spinning Disc |
7:54 | |
| |
Angular Momentum |
9:41 | |
| |
| Linear Momentum |
9:43 | |
| |
| Angular Momentum |
10:00 | |
| |
Calculating Angular Momentum |
10:51 | |
| |
| Direction of the Angular Momentum Vector |
11:26 | |
| |
| Total Angular Momentum |
12:29 | |
| |
Example 4: Angular Momentum of Particles |
14:15 | |
| |
Example 5: Rotating Pedestal |
16:51 | |
| |
Example 6: Rotating Discs |
18:39 | |
| |
Angular Momentum and Heavenly Bodies |
20:13 | |
| |
Types of Kinetic Energy |
23:41 | |
| |
| Objects Traveling with a Translational Velocity |
23:45 | |
| |
| Objects Traveling with Angular Velocity |
24:00 | |
| |
Translational vs. Rotational Variables |
24:33 | |
| |
Example 7: Kinetic Energy of a Basketball |
25:45 | |
| |
Example 8: Playground Round-A-Bout |
28:17 | |
| |
Example 9: The Ice Skater |
30:54 | |
| |
Example 10: The Bowler |
33:15 | |
|
Work & Power |
31:20 |
| |
Intro |
0:00 | |
| |
Objectives |
0:09 | |
| |
What Is Work? |
0:31 | |
| |
| Power Output |
0:35 | |
| |
| Transfer Energy |
0:39 | |
| |
| Work is the Process of Moving an Object by Applying a Force |
0:46 | |
| |
Examples of Work |
0:56 | |
| |
Calculating Work |
2:16 | |
| |
| Only the Force in the Direction of the Displacement Counts |
2:33 | |
| |
| Formula for Work |
2:48 | |
| |
Example 1: Moving a Refrigerator |
3:16 | |
| |
Example 2: Liberating a Car |
3:59 | |
| |
Example 3: Crate on a Ramp |
5:20 | |
| |
Example 4: Lifting a Box |
7:11 | |
| |
Example 5: Pulling a Wagon |
8:38 | |
| |
Force vs. Displacement Graphs |
9:33 | |
| |
| The Area Under a Force vs. Displacement Graph is the Work Done by the Force |
9:37 | |
| |
| Find the Work Done |
9:49 | |
| |
Example 6: Work From a Varying Force |
11:00 | |
| |
Hooke's Law |
12:42 | |
| |
| The More You Stretch or Compress a Spring, The Greater the Force of the Spring |
12:46 | |
| |
| The Spring's Force is Opposite the Direction of Its Displacement from Equilibrium |
13:00 | |
| |
Determining the Spring Constant |
14:21 | |
| |
Work Done in Compressing the Spring |
15:27 | |
| |
Example 7: Finding Spring Constant |
16:21 | |
| |
Example 8: Calculating Spring Constant |
17:58 | |
| |
Power |
18:43 | |
| |
| Work |
18:46 | |
| |
| Power |
18:50 | |
| |
Example 9: Moving a Sofa |
19:26 | |
| |
Calculating Power |
20:41 | |
| |
Example 10: Motors Delivering Power |
21:27 | |
| |
Example 11: Force on a Cyclist |
22:40 | |
| |
Example 12: Work on a Spinning Mass |
23:52 | |
| |
Example 13: Work Done by Friction |
25:05 | |
| |
Example 14: Units of Power |
28:38 | |
| |
Example 15: Frictional Force on a Sled |
29:43 | |
|
Energy |
20:15 |
| |
Intro |
0:00 | |
| |
Objectives |
0:07 | |
| |
What is Energy? |
0:24 | |
| |
| The Ability or Capacity to do Work |
0:26 | |
| |
| The Ability or Capacity to Move an Object |
0:34 | |
| |
Types of Energy |
0:39 | |
| |
Energy Transformations |
2:07 | |
| |
| Transfer Energy by Doing Work |
2:12 | |
| |
| Work-Energy Theorem |
2:20 | |
| |
Units of Energy |
2:51 | |
| |
Kinetic Energy |
3:08 | |
| |
| Energy of Motion |
3:13 | |
| |
| Ability or Capacity of a Moving Object to Move Another Object |
3:17 | |
| |
| A Single Object Can Only Have Kinetic Energy |
3:46 | |
| |
Example 1: Kinetic Energy of a Motorcycle |
5:08 | |
| |
Potential Energy |
5:59 | |
| |
| Energy An Object Possesses |
6:10 | |
| |
| Gravitational Potential Energy |
7:21 | |
| |
| Elastic Potential Energy |
9:58 | |
| |
Internal Energy |
10:16 | |
| |
| Includes the Kinetic Energy of the Objects That Make Up the System and the Potential Energy of the Configuration |
10:20 | |
| |
Calculating Gravitational Potential Energy in a Constant Gravitational Field |
10:57 | |
| |
Sources of Energy on Earth |
12:41 | |
| |
Example 2: Potential Energy |
13:41 | |
| |
Example 3: Energy of a System |
14:40 | |
| |
Example 4: Kinetic and Potential Energy |
15:36 | |
| |
Example 5: Pendulum |
16:55 | |
|
Conservation of Energy |
23:20 |
| |
Intro |
0:00 | |
| |
Objectives |
0:08 | |
| |
Law of Conservation of Energy |
0:22 | |
| |
| Energy Cannot Be Created or Destroyed.. It Can Only Be Changed |
0:27 | |
| |
| Mechanical Energy |
0:34 | |
| |
| Conservation Laws |
0:40 | |
| |
| Examples |
0:49 | |
| |
Kinematics vs. Energy |
4:34 | |
| |
| Energy Approach |
4:56 | |
| |
| Kinematics Approach |
6:04 | |
| |
The Pendulum |
8:07 | |
| |
Example 1: Cart Compressing a Spring |
13:09 | |
| |
Example 2 |
14:23 | |
| |
Example 3: Car Skidding to a Stop |
16:15 | |
| |
Example 4: Accelerating an Object |
17:27 | |
| |
Example 5: Block on Ramp |
18:06 | |
| |
Example 6: Energy Transfers |
19:21 | |
|
Simple Harmonic Motion |
58:30 |
| |
Intro |
0:00 | |
| |
Objectives |
0:08 | |
| |
What Is Simple Harmonic Motion? |
0:57 | |
| |
| Nature's Typical Reaction to a Disturbance |
1:00 | |
| |
| A Displacement Which Results in a Linear Restoring Force Results in SHM |
1:25 | |
| |
Review of Springs |
1:43 | |
| |
| When a Force is Applied to a Spring, the Spring Applies a Restoring Force |
1:46 | |
| |
| When the Spring is in Equilibrium, It Is 'Unstrained' |
1:54 | |
| |
| Factors Affecting the Force of A Spring |
2:00 | |
| |
Oscillations |
3:42 | |
| |
| Repeated Motions |
3:45 | |
| |
| Cycle 1 |
3:52 | |
| |
| Period |
3:58 | |
| |
| Frequency |
4:07 | |
| |
Spring-Block Oscillator |
4:47 | |
| |
| Mass of the Block |
4:59 | |
| |
| Spring Constant |
5:05 | |
| |
Example 1: Spring-Block Oscillator |
6:30 | |
| |
Diagrams |
8:07 | |
| |
| Displacement |
8:42 | |
| |
| Velocity |
8:57 | |
| |
| Force |
9:36 | |
| |
| Acceleration |
10:09 | |
| |
| U |
10:24 | |
| |
| K |
10:47 | |
| |
Example 2: Harmonic Oscillator Analysis |
16:22 | |
| |
Circular Motion vs. SHM |
23:26 | |
| |
Graphing SHM |
25:52 | |
| |
Example 3: Position of an Oscillator |
28:31 | |
| |
Vertical Spring-Block Oscillator |
31:13 | |
| |
Example 4: Vertical Spring-Block Oscillator |
34:26 | |
| |
Example 5: Bungee |
36:39 | |
| |
The Pendulum |
43:55 | |
| |
| Mass Is Attached to a Light String That Swings Without Friction About the Vertical Equilibrium |
44:04 | |
| |
Energy and the Simple Pendulum |
44:58 | |
| |
Frequency and Period of a Pendulum |
48:25 | |
| |
| Period of an Ideal Pendulum |
48:31 | |
| |
| Assume Theta is Small |
48:54 | |
| |
Example 6: The Pendulum |
50:15 | |
| |
Example 7: Pendulum Clock |
53:38 | |
| |
Example 8: Pendulum on the Moon |
55:14 | |
| |
Example 9: Mass on a Spring |
56:01 | |
Section 3: Fluids |
|
Density & Buoyancy |
19:48 |
| |
Intro |
0:00 | |
| |
Objectives |
0:09 | |
| |
Fluids |
0:27 | |
| |
| Fluid is Matter That Flows Under Pressure |
0:31 | |
| |
| Fluid Mechanics is the Study of Fluids |
0:44 | |
| |
Density |
0:57 | |
| |
| Density is the Ratio of an Object's Mass to the Volume It Occupies |
0:58 | |
| |
| Less Dense Fluids |
1:06 | |
| |
| Less Dense Solids |
1:09 | |
| |
Example 1: Density of Water |
1:27 | |
| |
Example 2: Volume of Gold |
2:19 | |
| |
Example 3: Floating |
3:06 | |
| |
Buoyancy |
3:54 | |
| |
| Force Exerted by a Fluid on an Object, Opposing the Object's Weight |
3:56 | |
| |
| Buoyant Force Determined Using Archimedes Principle |
4:03 | |
| |
Example 4: Buoyant Force |
5:12 | |
| |
Example 5: Shark Tank |
5:56 | |
| |
Example 6: Concrete Boat |
7:47 | |
| |
Example 7: Apparent Mass |
10:08 | |
| |
Example 8: Volume of a Submerged Cube |
13:21 | |
| |
Example 9: Determining Density |
15:37 | |
|
Pressure & Pascal's Principle |
18:07 |
| |
Intro |
0:00 | |
| |
Objectives |
0:09 | |
| |
Pressure |
0:25 | |
| |
| Pressure is the Effect of a Force Acting Upon a Surface |
0:27 | |
| |
| Formula for Pressure |
0:41 | |
| |
| Force is Always Perpendicular to the Surface |
0:50 | |
| |
Exerting Pressure |
1:03 | |
| |
| Fluids Exert Outward Pressure in All Directions on the Sides of Any Container Holding the Fluid |
1:36 | |
| |
| Earth's Atmosphere Exerts Pressure |
1:42 | |
| |
Example 1: Pressure on Keyboard |
2:17 | |
| |
Example 2: Sleepy Fisherman |
3:03 | |
| |
Example 3: Scale on Planet Physica |
4:12 | |
| |
Example 4: Ranking Pressures |
5:00 | |
| |
Pressure on a Submerged Object |
6:45 | |
| |
| Pressure a Fluid Exerts on an Object Submerged in That Fluid |
6:46 | |
| |
| If There Is Atmosphere Above the Fluid |
7:03 | |
| |
Example 5: Gauge Pressure Scuba Diving |
7:27 | |
| |
Example 6: Absolute Pressure Scuba Diving |
8:13 | |
| |
Pascal's Principle |
8:51 | |
| |
Force Multiplication Using Pascal's Principle |
9:24 | |
| |
Example 7: Barber's Chair |
11:38 | |
| |
Example 8: Hydraulic Auto Lift |
13:26 | |
| |
Example 9: Pressure on a Penny |
14:41 | |
| |
Example 10: Depth in Fresh Water |
16:39 | |
| |
Example 11: Absolute vs. Gauge Pressure |
17:23 | |
|
Continuity Equation for Fluids |
7:00 |
| |
Intro |
0:00 | |
| |
Objectives |
0:08 | |
| |
Conservation of Mass for Fluid Flow |
0:18 | |
| |
| Law of Conservation of Mass for Fluids |
0:21 | |
| |
| Volume Flow Rate Remains Constant Throughout the Pipe |
0:35 | |
| |
Volume Flow Rate |
0:59 | |
| |
| Quantified In Terms Of Volume Flow Rate |
1:01 | |
| |
| Area of Pipe x Velocity of Fluid |
1:05 | |
| |
| Must Be Constant Throughout Pipe |
1:10 | |
| |
Example 1: Tapered Pipe |
1:44 | |
| |
Example 2: Garden Hose |
2:37 | |
| |
Example 3: Oil Pipeline |
4:49 | |
| |
Example 4: Roots of Continuity Equation |
6:16 | |
|
Bernoulli's Principle |
20:00 |
| |
Intro |
0:00 | |
| |
Objectives |
0:08 | |
| |
Bernoulli's Principle |
0:21 | |
| |
Airplane Wings |
0:35 | |
| |
Venturi Pump |
1:56 | |
| |
Bernoulli's Equation |
3:32 | |
| |
Example 1: Torricelli's Theorem |
4:38 | |
| |
Example 2: Gauge Pressure |
7:26 | |
| |
Example 3: Shower Pressure |
8:16 | |
| |
Example 4: Water Fountain |
12:29 | |
| |
Example 5: Elevated Cistern |
15:26 | |
Section 4: Thermal Physics |
|
Temperature, Heat, & Thermal Expansion |
24:17 |
| |
Intro |
0:00 | |
| |
Objectives |
0:12 | |
| |
Thermal Physics |
0:42 | |
| |
| Explores the Internal Energy of Objects Due to the Motion of the Atoms and Molecules Comprising the Objects |
0:46 | |
| |
| Explores the Transfer of This Energy From Object to Object |
0:53 | |
| |
Temperature |
1:00 | |
| |
| Thermal Energy Is Related to the Kinetic Energy of All the Particles Comprising the Object |
1:03 | |
| |
| The More Kinetic Energy of the Constituent Particles Have, The Greater the Object's Thermal Energy |
1:12 | |
| |
Temperature and Phases of Matter |
1:44 | |
| |
| Solids |
1:48 | |
| |
| Liquids |
1:56 | |
| |
| Gases |
2:02 | |
| |
Average Kinetic Energy and Temperature |
2:16 | |
| |
| Average Kinetic Energy |
2:24 | |
| |
| Boltzmann's Constant |
2:29 | |
| |
Temperature Scales |
3:06 | |
| |
Converting Temperatures |
4:37 | |
| |
Heat |
5:03 | |
| |
| Transfer of Thermal Energy |
5:06 | |
| |
| Accomplished Through Collisions Which is Conduction |
5:13 | |
| |
Methods of Heat Transfer |
5:52 | |
| |
| Conduction |
5:59 | |
| |
| Convection |
6:19 | |
| |
| Radiation |
6:31 | |
| |
Quantifying Heat Transfer in Conduction |
6:37 | |
| |
| Rate of Heat Transfer is Measured in Watts |
6:42 | |
| |
Thermal Conductivity |
7:12 | |
| |
Example 1: Average Kinetic Energy |
7:35 | |
| |
Example 2: Body Temperature |
8:22 | |
| |
Example 3: Temperature of Space |
9:30 | |
| |
Example 4: Temperature of the Sun |
10:44 | |
| |
Example 5: Heat Transfer Through Window |
11:38 | |
| |
Example 6: Heat Transfer Across a Rod |
12:40 | |
| |
Thermal Expansion |
14:18 | |
| |
| When Objects Are Heated, They Tend to Expand |
14:19 | |
| |
| At Higher Temperatures, Objects Have Higher Average Kinetic Energies |
14:24 | |
| |
| At Higher Levels of Vibration, The Particles Are Not Bound As Tightly to Each Other |
14:30 | |
| |
Linear Expansion |
15:11 | |
| |
| Amount a Material Expands is Characterized by the Material's Coefficient of Expansion |
15:14 | |
| |
| One-Dimensional Expansion -> Linear Coefficient of Expansion |
15:20 | |
| |
Volumetric Expansion |
15:38 | |
| |
| Three-Dimensional Expansion -> Volumetric Coefficient of Expansion |
15:45 | |
| |
| Volumetric Coefficient of Expansion is Roughly Three Times the Linear Coefficient of Expansion |
16:03 | |
| |
Coefficients of Thermal Expansion |
16:24 | |
| |
Example 7: Contracting Railroad Tie |
16:59 | |
| |
Example 8: Expansion of an Aluminum Rod |
18:37 | |
| |
Example 9: Water Spilling Out of a Glass |
20:18 | |
| |
Example 10: Average Kinetic Energy vs. Temperature |
22:18 | |
| |
Example 11: Expansion of a Ring |
23:07 | |
|
Ideal Gases |
24:15 |
| |
Intro |
0:00 | |
| |
Objectives |
0:10 | |
| |
Ideal Gases |
0:25 | |
| |
| Gas Is Comprised of Many Particles Moving Randomly in a Container |
0:34 | |
| |
| Particles Are Far Apart From One Another |
0:46 | |
| |
| Particles Do Not Exert Forces Upon One Another Unless They Come In Contact in an Elastic Collision |
0:53 | |
| |
Ideal Gas Law |
1:18 | |
| |
Atoms, Molecules, and Moles |
2:56 | |
| |
| Protons |
2:59 | |
| |
| Neutrons |
3:15 | |
| |
| Electrons |
3:18 | |
| |
| Examples |
3:25 | |
| |
Example 1: Counting Moles |
4:58 | |
| |
Example 2: Moles of CO2 in a Bottle |
6:00 | |
| |
Example 3: Pressurized CO2 |
6:54 | |
| |
Example 4: Helium Balloon |
8:53 | |
| |
Internal Energy of an Ideal Gas |
10:17 | |
| |
| The Average Kinetic Energy of the Particles of an Ideal Gas |
10:21 | |
| |
| Total Internal Energy of the Ideal Gas Can Be Found by Multiplying the Average Kinetic Energy of the Gas's Particles by the Numbers of Particles in the Gas |
10:32 | |
| |
Example 5: Internal Energy of Oxygen |
12:00 | |
| |
Example 6: Temperature of Argon |
12:41 | |
| |
Root-Mean-Square Velocity |
13:40 | |
| |
| This is the Square Root of the Average Velocity Squared For All the Molecules in the System |
13:43 | |
| |
| Derived from the Maxwell-Boltzmann Distribution Function |
13:56 | |
| |
Calculating vrms |
14:56 | |
| |
Example 7: Average Velocity of a Gas |
18:32 | |
| |
Example 8: Average Velocity of a Gas |
19:44 | |
| |
Example 9: vrms of Molecules in Equilibrium |
20:59 | |
| |
Example 10: Moles to Molecules |
22:25 | |
| |
Example 11: Relating Temperature and Internal Energy |
23:22 | |
|
Thermodynamics |
22:29 |
| |
Intro |
0:00 | |
| |
Objectives |
0:06 | |
| |
Zeroth Law of Thermodynamics |
0:26 | |
| |
First Law of Thermodynamics |
1:00 | |
| |
| The Change in the Internal Energy of a Closed System is Equal to the Heat Added to the System Plus the Work Done on the System |
1:04 | |
| |
| It is a Restatement of the Law of Conservation of Energy |
1:19 | |
| |
| Sign Conventions Are Important |
1:25 | |
| |
Work Done on a Gas |
1:44 | |
| |
Example 1: Adding Heat to a System |
3:25 | |
| |
Example 2: Expanding a Gas |
4:07 | |
| |
P-V Diagrams |
5:11 | |
| |
| Pressure-Volume Diagrams are Useful Tools for Visualizing Thermodynamic Processes of Gases |
5:13 | |
| |
| Use Ideal Gas Law to Determine Temperature of Gas |
5:25 | |
| |
P-V Diagrams II |
5:55 | |
| |
| Volume Increases, Pressure Decreases |
6:00 | |
| |
| As Volume Expands, Gas Does Work |
6:19 | |
| |
| Temperature Rises as You Travel Up and Right on a PV Diagram |
6:29 | |
| |
Example 3: PV Diagram Analysis |
6:40 | |
| |
Types of PV Processes |
7:52 | |
| |
| Adiabatic |
8:03 | |
| |
| Isobaric |
8:19 | |
| |
| Isochoric |
8:28 | |
| |
| Isothermal |
8:35 | |
| |
Adiabatic Processes |
8:47 | |
| |
| Heat Is not Transferred Into or Out of The System |
8:50 | |
| |
| Heat = 0 |
8:55 | |
| |
Isobaric Processes |
9:19 | |
| |
| Pressure Remains Constant |
9:21 | |
| |
| PV Diagram Shows a Horizontal Line |
9:27 | |
| |
Isochoric Processes |
9:51 | |
| |
| Volume Remains Constant |
9:52 | |
| |
| PV Diagram Shows a Vertical Line |
9:58 | |
| |
| Work Done on the Gas is Zero |
10:01 | |
| |
Isothermal Processes |
10:27 | |
| |
| Temperature Remains Constant |
10:29 | |
| |
| Lines on a PV Diagram Are Isotherms |
10:31 | |
| |
| PV Remains Constant |
10:38 | |
| |
| Internal Energy of Gas Remains Constant |
10:40 | |
| |
Example 4: Adiabatic Expansion |
10:46 | |
| |
Example 5: Removing Heat |
11:25 | |
| |
Example 6: Ranking Processes |
13:08 | |
| |
Second Law of Thermodynamics |
13:59 | |
| |
| Heat Flows Naturally From a Warmer Object to a Colder Object |
14:02 | |
| |
| Heat Energy Cannot be Completely Transformed Into Mechanical Work |
14:11 | |
| |
| All Natural Systems Tend Toward a Higher Level of Disorder |
14:19 | |
| |
Heat Engines |
14:52 | |
| |
| Heat Engines Convert Heat Into Mechanical Work |
14:56 | |
| |
| Efficiency of a Heat Engine is the Ratio of the Engine You Get Out to the Energy You Put In |
14:59 | |
| |
Power in Heat Engines |
16:09 | |
| |
Heat Engines and PV Diagrams |
17:38 | |
| |
Carnot Engine |
17:54 | |
| |
| It Is a Theoretical Heat Engine That Operates at Maximum Possible Efficiency |
18:02 | |
| |
| It Uses Only Isothermal and Adiabatic Processes |
18:08 | |
| |
| Carnot's Theorem |
18:11 | |
| |
Example 7: Carnot Engine |
18:49 | |
| |
Example 8: Maximum Efficiency |
21:02 | |
| |
Example 9: PV Processes |
21:51 | |
Section 5: Electricity & Magnetism |
|
Electric Fields & Forces |
38:24 |
| |
Intro |
0:00 | |
| |
Objectives |
0:10 | |
| |
Electric Charges |
0:34 | |
| |
| Matter is Made Up of Atoms |
0:37 | |
| |
| Protons Have a Charge of +1 |
0:45 | |
| |
| Electrons Have a Charge of -1 |
1:00 | |
| |
| Most Atoms Are Neutral |
1:04 | |
| |
| Ions |
1:15 | |
| |
| Fundamental Unit of Charge is the Coulomb |
1:29 | |
| |
| Like Charges Repel, While Opposites Attract |
1:50 | |
| |
Example 1: Charge on an Object |
2:22 | |
| |
Example 2: Charge of an Alpha Particle |
3:36 | |
| |
Conductors and Insulators |
4:27 | |
| |
| Conductors Allow Electric Charges to Move Freely |
4:30 | |
| |
| Insulators Do Not Allow Electric Charges to Move Freely |
4:39 | |
| |
| Resistivity is a Material Property |
4:45 | |
| |
Charging by Conduction |
5:05 | |
| |
| Materials May Be Charged by Contact, Known as Conduction |
5:07 | |
| |
| Conductors May Be Charged by Contact |
5:24 | |
| |
Example 3: Charging by Conduction |
5:38 | |
| |
The Electroscope |
6:44 | |
| |
Charging by Induction |
8:00 | |
| |
Example 4: Electrostatic Attraction |
9:23 | |
| |
Coulomb's Law |
11:46 | |
| |
| Charged Objects Apply a Force Upon Each Other = Coulombic Force |
11:52 | |
| |
| Force of Attraction or Repulsion is Determined by the Amount of Charge and the Distance Between the Charges |
12:04 | |
| |
Example 5: Determine Electrostatic Force |
13:09 | |
| |
Example 6: Deflecting an Electron Beam |
15:35 | |
| |
Electric Fields |
16:28 | |
| |
| The Property of Space That Allows a Charged Object to Feel a Force |
16:44 | |
| |
| Electric Field Strength Vector is the Amount of Electrostatic Force Observed by a Charge Per Unit of Charge |
17:01 | |
| |
| The Direction of the Electric Field Vector is the Direction a Positive Charge Would Feel a Force |
17:24 | |
| |
Example 7: Field Between Metal Plates |
17:58 | |
| |
Visualizing the Electric Field |
19:27 | |
| |
| Electric Field Lines Point Away from Positive Charges and Toward Negative Charges |
19:40 | |
| |
| Electric Field Lines Intersect Conductors at Right Angles to the Surface |
19:50 | |
| |
| Field Strength and Line Density Decreases as You Move Away From the Charges |
19:58 | |
| |
Electric Field Lines |
20:09 | |
| |
E Field Due to a Point Charge |
22:32 | |
| |
| Electric Fields Are Caused by Charges |
22:35 | |
| |
| Electric Field Due to a Point Charge Can Be Derived From the Definition of the Electric Field and Coulomb's Law |
22:38 | |
| |
| To Find the Electric Field Due to Multiple Charges |
23:09 | |
| |
Comparing Electricity to Gravity |
23:56 | |
| |
| Force |
24:02 | |
| |
| Field Strength |
24:16 | |
| |
| Constant |
24:37 | |
| |
| Charge/ Mass Units |
25:01 | |
| |
Example 8: E Field From 3 Point Charges |
25:07 | |
| |
Example 9: Where is the E Field Zero? |
31:43 | |
| |
Example 10: Gravity and Electricity |
36:38 | |
| |
Example 11: Field Due to Point Charge |
37:34 | |
|
Electric Potential Difference |
35:58 |
| |
Intro |
0:00 | |
| |
Objectives |
0:09 | |
| |
Electric Potential Energy |
0:32 | |
| |
| When an Object Was Lifted Against Gravity By Applying a Force for Some Distance, Work Was Done |
0:35 | |
| |
| When a Charged Object is Moved Against an Electric Field by Applying a Force for Some Distance, Work is Done |
0:43 | |
| |
| Electric Potential Difference |
1:30 | |
| |
Example 1: Charge From Work |
2:06 | |
| |
Example 2: Electric Energy |
3:09 | |
| |
The Electron-Volt |
4:02 | |
| |
| Electronvolt (eV) |
4:15 | |
| |
| 1eV is the Amount of Work Done in Moving an Elementary Charge Through a Potential Difference of 1 Volt |
4:28 | |
| |
Example 3: Energy in eV |
5:33 | |
| |
Equipotential Lines |
6:32 | |
| |
| Topographic Maps Show Lines of Equal Altitude, or Equal Gravitational Potential |
6:36 | |
| |
| Lines Connecting Points of Equal Electrical Potential are Known as Equipotential Lines |
6:57 | |
| |
Drawing Equipotential Lines |
8:15 | |
| |
Potential Due to a Point Charge |
10:46 | |
| |
| Calculate the Electric Field Vector Due to a Point Charge |
10:52 | |
| |
| Calculate the Potential Difference Due to a Point Charge |
11:05 | |
| |
| To Find the Potential Difference Due to Multiple Point Charges |
11:16 | |
| |
Example 4: Potential Due to a Point Charge |
11:52 | |
| |
Example 5: Potential Due to Point Charges |
13:04 | |
| |
Parallel Plates |
16:34 | |
| |
| Configurations in Which Parallel Plates of Opposite Charge are Situated a Fixed Distance From Each Other |
16:37 | |
| |
| These Can Create a Capacitor |
16:45 | |
| |
E Field Due to Parallel Plates |
17:14 | |
| |
| Electric Field Away From the Edges of Two Oppositely Charged Parallel Plates is Constant |
17:15 | |
| |
| Magnitude of the Electric Field Strength is Give By the Potential Difference Between the Plates Divided by the Plate Separation |
17:47 | |
| |
Capacitors |
18:09 | |
| |
| Electric Device Used to Store Charge |
18:11 | |
| |
| Once the Plates Are Charged, They Are Disconnected |
18:30 | |
| |
| Device's Capacitance |
18:46 | |
| |
Capacitors Store Energy |
19:28 | |
| |
| Charges Located on the Opposite Plates of a Capacitor Exert Forces on Each Other |
19:31 | |
| |
Example 6: Capacitance |
20:28 | |
| |
Example 7: Charge on a Capacitor |
22:03 | |
| |
Designing Capacitors |
24:00 | |
| |
| Area of the Plates |
24:05 | |
| |
| Separation of the Plates |
24:09 | |
| |
| Insulating Material |
24:13 | |
| |
Example 8: Designing a Capacitor |
25:35 | |
| |
Example 9: Calculating Capacitance |
27:39 | |
| |
Example 10: Electron in Space |
29:47 | |
| |
Example 11: Proton Energy Transfer |
30:35 | |
| |
Example 12: Two Conducting Spheres |
32:50 | |
| |
Example 13: Equipotential Lines for a Capacitor |
34:48 | |
|
Current & Resistance |
21:14 |
| |
Intro |
0:00 | |
| |
Objectives |
0:06 | |
| |
Electric Current |
0:19 | |
| |
| Path Through Current Flows |
0:21 | |
| |
| Current is the Amount of Charge Passing a Point Per Unit Time |
0:25 | |
| |
| Conventional Current is the Direction of Positive Charge Flow |
0:43 | |
| |
Example 1: Current Through a Resistor |
1:19 | |
| |
Example 2: Current Due to Elementary Charges |
1:47 | |
| |
Example 3: Charge in a Light Bulb |
2:35 | |
| |
Example 4: Flashlights |
3:3 | |
| |
Conductivity and Resistivity |
4:41 | |
| |
| Conductivity is a Material's Ability to Conduct Electric Charge |
4:53 | |
| |
| Resistivity is a Material's Ability to Resist the Movement of Electric Charge |
5:11 | |
| |
Resistance vs. Resistivity vs. Resistors |
5:35 | |
| |
| Resistivity Is a Material Property |
5:40 | |
| |
| Resistance Is a Functional Property of an Element in an Electric Circuit |
5:57 | |
| |
| A Resistor is a Circuit Element |
7:23 | |
| |
Resistors |
7:45 | |
| |
Example 5: Calculating Resistance |
8:17 | |
| |
Example 6: Resistance Dependencies |
10:09 | |
| |
Configuration of Resistors |
10:50 | |
| |
| When Placed in a Circuit, Resistors Can be Organized in Both Serial and Parallel Arrangements |
10:53 | |
| |
| May Be Useful to Determine an Equivalent Resistance Which Could Be Used to Replace a System or Resistors with a Single Equivalent Resistor |
10:58 | |
| |
Resistors in Series |
11:15 | |
| |
Resistors in Parallel |
12:35 | |
| |
Example 7: Finding Equivalent Resistance |
15:01 | |
| |
Example 8: Length and Resistance |
17:43 | |
| |
Example 9: Comparing Resistors |
18:21 | |
| |
Example 10: Comparing Wires |
19:12 | |
|
Ohm's Law & Power |
10:35 |
| |
Intro |
0:00 | |
| |
Objectives |
0:06 | |
| |
Ohm's Law |
0:21 | |
| |
| Relates Resistance, Potential Difference, and Current Flow |
0:23 | |
| |
Example 1: Resistance of a Wire |
1:22 | |
| |
Example 2: Circuit Current |
1:58 | |
| |
Example 3: Variable Resistor |
2:30 | |
| |
Ohm's 'Law'? |
3:22 | |
| |
| Very Useful Empirical Relationship |
3:31 | |
| |
| Test if a Material is 'Ohmic' |
3:40 | |
| |
Example 4: Ohmic Material |
3:58 | |
| |
Electrical Power |
4:24 | |
| |
| Current Flowing Through a Circuit Causes a Transfer of Energy Into Different Types |
4:26 | |
| |
| Example: Light Bulb |
4:36 | |
| |
| Example: Television |
4:58 | |
| |
Calculating Power |
5:09 | |
| |
| Electrical Energy |
5:14 | |
| |
| Charge Per Unit Time Is Current |
5:29 | |
| |
| Expand Using Ohm's Law |
5:48 | |
| |
Example 5: Toaster |
7:43 | |
| |
Example 6: Electric Iron |
8:19 | |
| |
Example 7: Power of a Resistor |
9:19 | |
| |
Example 8: Information Required to Determine Power in a Resistor |
9:55 | |
|
Circuits & Electrical Meters |
8:44 |
| |
Intro |
0:00 | |
| |
Objectives |
0:08 | |
| |
Electrical Circuits |
0:21 | |
| |
| A Closed-Loop Path Through Which Current Can Flow |
0:22 | |
| |
| Can Be Made Up of Most Any Materials, But Typically Comprised of Electrical Devices |
0:27 | |
| |
Circuit Schematics |
1:09 | |
| |
| Symbols Represent Circuit Elements |
1:30 | |
| |
| Lines Represent Wires |
1:33 | |
| |
| Sources for Potential Difference: Voltaic Cells, Batteries, Power Supplies |
1:36 | |
| |
Complete Conducting Paths |
2:43 | |
| |
Voltmeters |
3:20 | |
| |
| Measure the Potential Difference Between Two Points in a Circuit |
3:21 | |
| |
| Connected in Parallel with the Element to be Measured |
3:25 | |
| |
| Have Very High Resistance |
3:59 | |
| |
Ammeters |
4:19 | |
| |
| Measure the Current Flowing Through an Element of a Circuit |
4:20 | |
| |
| Connected in Series with the Circuit |
4:25 | |
| |
| Have Very Low Resistance |
4:45 | |
| |
Example 1: Ammeter and Voltmeter Placement |
4:56 | |
| |
Example 2: Analyzing R |
6:27 | |
| |
Example 3: Voltmeter Placement |
7:12 | |
| |
Example 4: Behavior or Electrical Meters |
7:31 | |
|
Circuit Analysis |
48:58 |
| |
Intro |
0:00 | |
| |
Objectives |
0:07 | |
| |
Series Circuits |
0:27 | |
| |
| Series Circuits Have Only a Single Current Path |
0:29 | |
| |
| Removal of any Circuit Element Causes an Open Circuit |
0:31 | |
| |
Kirchhoff's Laws |
1:36 | |
| |
| Tools Utilized in Analyzing Circuits |
1:42 | |
| |
| Kirchhoff's Current Law States |
1:47 | |
| |
| Junction Rule |
2:00 | |
| |
| Kirchhoff's Voltage Law States |
2:05 | |
| |
| Loop Rule |
2:18 | |
| |
Example 1: Voltage Across a Resistor |
2:23 | |
| |
Example 2: Current at a Node |
3:45 | |
| |
Basic Series Circuit Analysis |
4:53 | |
| |
Example 3: Current in a Series Circuit |
9:21 | |
| |
Example 4: Energy Expenditure in a Series Circuit |
10:14 | |
| |
Example 5: Analysis of a Series Circuit |
12:07 | |
| |
Example 6: Voltmeter In a Series Circuit |
14:57 | |
| |
Parallel Circuits |
17:11 | |
| |
| Parallel Circuits Have Multiple Current Paths |
17:13 | |
| |
| Removal of a Circuit Element May Allow Other Branches of the Circuit to Continue Operating |
17:15 | |
| |
Basic Parallel Circuit Analysis |
18:19 | |
| |
Example 7: Parallel Circuit Analysis |
21:05 | |
| |
Example 8: Equivalent Resistance |
22:39 | |
| |
Example 9: Four Parallel Resistors |
23:16 | |
| |
Example 10: Ammeter in a Parallel Circuit |
26:27 | |
| |
Combination Series-Parallel Circuits |
28:50 | |
| |
| Look For Portions of the Circuit With Parallel Elements |
28:56 | |
| |
| Work Back to Original Circuit |
29:09 | |
| |
Analysis of a Combination Circuit |
29:20 | |
| |
Internal Resistance |
34:11 | |
| |
| In Reality, Voltage Sources Have Some Amount of 'Internal Resistance' |
34:16 | |
| |
| Terminal Voltage of the Voltage Source is Reduced Slightly |
34:25 | |
| |
Example 11: Two Voltage Sources |
35:16 | |
| |
Example 12: Internal Resistance |
42:46 | |
| |
Example 13: Complex Circuit with Meters |
45:22 | |
| |
Example 14: Parallel Equivalent Resistance |
48:24 | |
|
RC Circuits |
24:47 |
| |
Intro |
0:00 | |
| |
Objectives |
0:08 | |
| |
Capacitors in Parallel |
0:34 | |
| |
| Capacitors Store Charge on Their Plates |
0:37 | |
| |
| Capacitors In Parallel Can Be Replaced with an Equivalent Capacitor |
0:46 | |
| |
Capacitors in Series |
2:42 | |
| |
| Charge on Capacitors Must Be the Same |
2:44 | |
| |
| Capacitor In Series Can Be Replaced With an Equivalent Capacitor |
2:47 | |
| |
RC Circuits |
5:40 | |
| |
| Comprised of a Source of Potential Difference, a Resistor Network, and One or More Capacitors |
5:42 | |
| |
| Uncharged Capacitors Act Like Wires |
6:04 | |
| |
| Charged Capacitors Act Like Opens |
6:12 | |
| |
Charging an RC Circuit |
6:23 | |
| |
Discharging an RC Circuit |
11:36 | |
| |
Example 1: RC Analysis |
14:50 | |
| |
Example 2: More RC Analysis |
18:26 | |
| |
Example 3: Equivalent Capacitance |
21:19 | |
| |
Example 4: More Equivalent Capacitance |
22:48 | |
|
Magnetic Fields & Properties |
19:48 |
| |
Intro |
0:00 | |
| |
Objectives |
0:07 | |
| |
Magnetism |
0:32 | |
| |
| A Force Caused by Moving Charges |
0:34 | |
| |
| Magnetic Domains Are Clusters of Atoms with Electrons Spinning in the Same Direction |
0:51 | |
| |
Example 1: Types of Fields |
1:23 | |
| |
Magnetic Field Lines |
2:25 | |
| |
| Make Closed Loops and Run From North to South Outside the Magnet |
2:26 | |
| |
| Magnetic Flux |
2:42 | |
| |
| Show the Direction the North Pole of a Magnet Would Tend to Point If Placed in the Field |
2:54 | |
| |
Example 2: Lines of Magnetic Force |
3:49 | |
| |
Example 3: Forces Between Bar Magnets |
4:39 | |
| |
The Compass |
5:28 | |
| |
| The Earth is a Giant Magnet |
5:31 | |
| |
| The Earth's Magnetic North pole is Located Near the Geographic South Pole, and Vice Versa |
5:33 | |
| |
| A Compass Lines Up with the Net Magnetic Field |
6:07 | |
| |
Example 3: Compass in Magnetic Field |
6:41 | |
| |
Example 4: Compass Near a Bar Magnet |
7:14 | |
| |
Magnetic Permeability |
7:59 | |
| |
| The Ratio of the Magnetic Field Strength Induced in a Material to the Magnetic Field Strength of the Inducing Field |
8:02 | |
| |
| Free Space |
8:13 | |
| |
| Highly Magnetic Materials Have Higher Values of Magnetic Permeability |
8:34 | |
| |
Magnetic Dipole Moment |
8:41 | |
| |
| The Force That a Magnet Can Exert on Moving Charges |
8:46 | |
| |
| Relative Strength of a Magnet |
8:54 | |
| |
Forces on Moving Charges |
9:10 | |
| |
| Moving Charges Create Magnetic Fields |
9:11 | |
| |
| Magnetic Fields Exert Forces on Moving Charges |
9:17 | |
| |
Direction of the Magnetic Force |
9:57 | |
| |
| Direction is Given by the Right-Hand Rule |
10:05 | |
| |
| Right-Hand Rule |
10:09 | |
| |
Mass Spectrometer |
10:52 | |
| |
| Magnetic Fields Accelerate Moving Charges So That They Travel in a Circle |
10:58 | |
| |
| Used to Determine the Mass of an Unknown Particle |
11:04 | |
| |
Velocity Selector |
12:44 | |
| |
| Mass Spectrometer with an Electric Field Added |
12:47 | |
| |
Example 5: Force on an Electron |
14:13 | |
| |
Example 6: Velocity of a Charged Particle |
15:25 | |
| |
Example 7: Direction of the Magnetic Force |
16:52 | |
| |
Example 8: Direction of Magnetic Force on Moving Charges |
17:43 | |
| |
Example 9: Electron Released From Rest in Magnetic Field |
18:53 | |
|
Current-Carrying Wires |
21:29 |
| |
Intro |
0:00 | |
| |
Objectives |
0:09 | |
| |
Force on a Current-Carrying Wire |
0:30 | |
| |
| A Current-Carrying Wire in a Magnetic Field May Experience a Magnetic Force |
0:33 | |
| |
| Direction Given by the Right-Hand Rule |
1:11 | |
| |
Example 1: Force on a Current-Carrying Wire |
1:38 | |
| |
Example 2: Equilibrium on a Submerged Wire |
2:33 | |
| |
Example 3: Torque on a Loop of Wire |
5:55 | |
| |
Magnetic Field Due to a Current-Carrying Wire |
8:49 | |
| |
| Moving Charges Create Magnetic Fields |
8:53 | |
| |
| Wires Carry Moving Charges |
8:56 | |
| |
| Direction Given by the Right-Hand Rule |
9:21 | |
| |
Example 4: Magnetic Field Due to a Wire |
10:56 | |
| |
Magnetic Field Due to a Solenoid |
12:12 | |
| |
| Solenoid is a Coil of Wire |
12:19 | |
| |
| Direction Given by the Right-Hand Rule |
12:47 | |
| |
Forces on 2 Parallel Wires |
13:34 | |
| |
| Current Flowing in the Same Direction |
14:52 | |
| |
| Current Flowing in Opposite Directions |
14:57 | |
| |
Example 5: Magnetic Field Due to Wires |
15:19 | |
| |
Example 6: Strength of an Electromagnet |
18:35 | |
| |
Example 7: Force on a Wire |
19:30 | |
| |
Example 8: Force Between Parallel Wires |
20:47 | |
|
Intro to Electromagnetic Induction |
17:26 |
| |
Intro |
0:00 | |
| |
Objectives |
0:09 | |
| |
Induced EMF |
0:42 | |
| |
| Charges Flowing Through a Wire Create Magnetic Fields |
0:45 | |
| |
| Changing Magnetic Fields Cause Charges to Flow or 'Induce' a Current in a Process Known As Electromagnetic Induction |
0:49 | |
| |
| Electro-Motive Force is the Potential Difference Created by a Changing Magnetic Field |
0:57 | |
| |
| Magnetic Flux is the Amount of Magnetic Fields Passing Through an Area |
1:17 | |
| |
Finding the Magnetic Flux |
1:36 | |
| |
| Magnetic Field Strength |
1:39 | |
| |
| Angle Between the Magnetic Field Strength and the Normal to the Area |
1:51 | |
| |
Calculating Induced EMF |
3:01 | |
| |
| The Magnitude of the Induced EMF is Equal to the Rate of Change of the Magnetic Flux |
3:04 | |
| |
Induced EMF in a Rectangular Loop of Wire |
4:03 | |
| |
Lenz's Law |
5:17 | |
| |
Electric Generators and Motors |
9:28 | |
| |
| Generate an Induced EMF By Turning a Coil of Wire in a magnetic Field |
9:31 | |
| |
| Generators Use Mechanical Energy to Turn the Coil of Wire |
9:39 | |
| |
| Electric Motor Operates Using Same Principle |
10:30 | |
| |
Example 1: Finding Magnetic Flux |
10:43 | |
| |
Example 2: Finding Induced EMF |
11:54 | |
| |
Example 3: Changing Magnetic Field |
13:52 | |
| |
Example 4: Current Induced in a Rectangular Loop of Wire |
15:23 | |
Section 6: Waves & Optics |
|
Wave Characteristics |
26:41 |
| |
Intro |
0:00 | |
| |
Objectives |
0:09 | |
| |
Waves |
0:32 | |
| |
Pulse |
1:00 | |
| |
| A Pulse is a Single Disturbance Which Carries Energy Through a Medium or Space |
1:05 | |
| |
| A Wave is a Series of Pulses |
1:18 | |
| |
| When a Pulse Reaches a Hard Boundary |
1:37 | |
| |
| When a Pulse Reaches a Soft or Flexible Boundary |
2:04 | |
| |
Types of Waves |
2:44 | |
| |
| Mechanical Waves |
2:56 | |
| |
| Electromagnetic Waves |
3:14 | |
| |
Types of Wave Motion |
3:38 | |
| |
| Longitudinal Waves |
3:39 | |
| |
| Transverse Waves |
4:18 | |
| |
Anatomy of a Transverse Wave |
5:18 | |
| |
Example 1: Waves Requiring a Medium |
6:59 | |
| |
Example 2: Direction of Displacement |
7:36 | |
| |
Example 3: Bell in a Vacuum Jar |
8:47 | |
| |
Anatomy of a Longitudinal Wave |
9:22 | |
| |
Example 4: Tuning Fork |
9:57 | |
| |
Example 5: Amplitude of a Sound Wave |
10:24 | |
| |
Frequency and Period |
10:47 | |
| |
Example 6: Period of an EM Wave |
11:23 | |
| |
Example 7: Frequency and Period |
12:01 | |
| |
The Wave Equation |
12:32 | |
| |
| Velocity of a Wave is a Function of the Type of Wave and the Medium It Travels Through |
12:36 | |
| |
| Speed of a Wave is Related to Its Frequency and Wavelength |
12:41 | |
| |
Example 8: Wavelength Using the Wave Equation |
13:54 | |
| |
Example 9: Period of an EM Wave |
14:35 | |
| |
Example 10: Blue Whale Waves |
16:03 | |
| |
Sound Waves |
17:29 | |
| |
| Sound is a Mechanical Wave Observed by Detecting Vibrations in the Inner Ear |
17:33 | |
| |
| Particles of Sound Wave Vibrate Parallel With the Direction of the Wave's Velocity |
17:56 | |
| |
Example 11: Distance from Speakers |
18:24 | |
| |
Resonance |
19:45 | |
| |
| An Object with the Same 'Natural Frequency' May Begin to Vibrate at This Frequency |
19:55 | |
| |
| Classic Example |
20:01 | |
| |
Example 12: Vibrating Car |
20:32 | |
| |
Example 13: Sonar Signal |
21:28 | |
| |
Example 14: Waves Across Media |
24:06 | |
| |
Example 15: Wavelength of Middle C |
25:24 | |
|
Wave Interference |
20:45 |
| |
Intro |
0:00 | |
| |
Objectives |
0:09 | |
| |
Superposition |
0:30 | |
| |
| When More Than One Wave Travels Through the Same Location in the Same Medium |
0:32 | |
| |
| The Total Displacement is the Sum of All the Individual Displacements of the Waves |
0:46 | |
| |
Example 1: Superposition of Pulses |
1:01 | |
| |
Types of Interference |
2:02 | |
| |
| Constructive Interference |
2:05 | |
| |
| Destructive Interference |
2:18 | |
| |
Example 2: Interference |
2:47 | |
| |
Example 3: Shallow Water Waves |
3:27 | |
| |
Standing Waves |
4:23 | |
| |
| When Waves of the Same Frequency and Amplitude Traveling in Opposite Directions Meet in the Same Medium |
4:26 | |
| |
| A Wave in Which Nodes Appear to be Standing Still and Antinodes Vibrate with Maximum Amplitude Above and Below the Axis |
4:35 | |
| |
Standing Waves in String Instruments |
5:36 | |
| |
Standing Waves in Open Tubes |
8:49 | |
| |
Standing Waves in Closed Tubes |
9:57 | |
| |
Interference From Multiple Sources |
11:43 | |
| |
| Constructive |
11:55 | |
| |
| Destructive |
12:14 | |
| |
Beats |
12:49 | |
| |
| Two Sound Waves with Almost the Same Frequency Interfere to Create a Beat Pattern |
12:52 | |
| |
| A Frequency Difference of 1 to 4 Hz is Best for Human Detection of Beat Phenomena |
13:05 | |
| |
Example 4 |
14:13 | |
| |
Example 5 |
18:03 | |
| |
Example 6 |
19:14 | |
| |
Example 7: Superposition |
20:08 | |
|
Wave Phenomena |
19:02 |
| |
Intro |
0:00 | |
| |
Objective |
0:08 | |
| |
Doppler Effect |
0:36 | |
| |
| The Shift In A Wave's Observed Frequency Due to Relative Motion Between the Source of the Wave and Observer |
0:39 | |
| |
| When Source and/or Observer Move Toward Each Other |
0:45 | |
| |
| When Source and/or Observer Move Away From Each Other |
0:52 | |
| |
Practical Doppler Effect |
1:01 | |
| |
| Vehicle Traveling Past You |
1:05 | |
| |
| Applications Are Numerous and Widespread |
1:56 | |
| |
Doppler Effect - Astronomy |
2:43 | |
| |
| Observed Frequencies Are Slightly Lower Than Scientists Would Predict |
2:50 | |
| |
| More Distant Celestial Objects Are Moving Away from the Earth Faster Than Nearer Objects |
3:22 | |
| |
Example 1: Car Horn |
3:36 | |
| |
Example 2: Moving Speaker |
4:13 | |
| |
Diffraction |
5:35 | |
| |
| The Bending of Waves Around Obstacles |
5:37 | |
| |
| Most Apparent When Wavelength Is Same Order of Magnitude as the Obstacle/ Opening |
6:10 | |
| |
Single-Slit Diffraction |
6:16 | |
| |
Double-Slit Diffraction |
8:13 | |
| |
Diffraction Grating |
11:07 | |
| |
| Sharper and Brighter Maxima |
11:46 | |
| |
| Useful for Determining Wavelengths Accurately |
12:07 | |
| |
Example 3: Double Slit Pattern |
12:30 | |
| |
Example 4: Determining Wavelength |
16:05 | |
| |
Example 5: Radar Gun |
18:04 | |
| |
Example 6: Red Shift |
18:29 | |
|
Light As a Wave |
11:35 |
| |
Intro |
0:00 | |
| |
Objectives |
0:14 | |
| |
Electromagnetic (EM) Waves |
0:31 | |
| |
| Light is an EM Wave |
0:43 | |
| |
| EM Waves Are Transverse Due to the Modulation of the Electric and Magnetic Fields Perpendicular to the Wave Velocity |
1:00 | |
| |
Electromagnetic Wave Characteristics |
1:37 | |
| |
| The Product of an EM Wave's Frequency and Wavelength Must be Constant in a Vacuum |
1:43 | |
| |
Polarization |
3:36 | |
| |
| Unpoloarized EM Waves Exhibit Modulation in All Directions |
3:47 | |
| |
| Polarized Light Consists of Light Vibrating in a Single Direction |
4:07 | |
| |
Polarizers |
4:29 | |
| |
| Materials Which Act Like Filters to Only Allow Specific Polarizations of Light to Pass |
4:33 | |
| |
| Polarizers Typically Are Sheets of Material in Which Long Molecules Are Lined Up Like a Picket Fence |
5:10 | |
| |
Polarizing Sunglasses |
5:22 | |
| |
| Reduce Reflections |
5:26 | |
| |
| Polarizing Sunglasses Have Vertical Polarizing Filters |
5:48 | |
| |
Liquid Crystal Displays |
6:08 | |
| |
| LCDs Use Liquid Crystals in a Suspension That Align Themselves in a Specific Orientation When a Voltage is Applied |
6:13 | |
| |
| Cross-Orienting a Polarizer and a Matrix of Liquid Crystals so Light Can Be Modulated Pixel-by-Pixel |
6:26 | |
| |
Example 1: Color of Light |
7:30 | |
| |
Example 2: Analyzing an EM Wave |
8:49 | |
| |
Example 3: Remote Control |
9:45 | |
| |
Example 4: Comparing EM Waves |
10:32 | |
|
Reflection & Mirrors |
24:32 |
| |
Intro |
0:00 | |
| |
Objectives |
0:10 | |
| |
Waves at Boundaries |
0:37 | |
| |
| Reflected |
0:43 | |
| |
| Transmitted |
0:45 | |
| |
| Absorbed |
0:48 | |
| |
Law of Reflection |
0:58 | |
| |
| The Angle of Incidence is Equal to the Angle of Reflection |
1:00 | |
| |
| They Are Both Measured From a Line Perpendicular, or Normal, to the Reflecting Surface |
1:22 | |
| |
Types of Reflection |
1:54 | |
| |
| Diffuse Reflection |
1:57 | |
| |
| Specular Reflection |
2:08 | |
| |
Example 1: Specular Reflection |
2:24 | |
| |
Mirrors |
3:20 | |
| |
| Light Rays From the Object Reach the Plane Mirror and Are Reflected to the Observer |
3:27 | |
| |
| Virtual Image |
3:33 | |
| |
| Magnitude of Image Distance |
4:05 | |
| |
Plane Mirror Ray Tracing |
4:15 | |
| |
| Object Distance |
4:26 | |
| |
| Image Distance |
4:43 | |
| |
| Magnification of Image |
7:03 | |
| |
Example 2: Plane Mirror Images |
7:28 | |
| |
Example 3: Image in a Plane Mirror |
7:51 | |
| |
Spherical Mirrors |
8:10 | |
| |
| Inner Surface of a Spherical Mirror |
8:19 | |
| |
| Outer Surface of a Spherical Mirror |
8:30 | |
| |
| Focal Point of a Spherical Mirror |
8:40 | |
| |
| Converging |
8:51 | |
| |
| Diverging |
9:00 | |
| |
Concave (Converging) Spherical Mirrors |
9:09 | |
| |
| Light Rays Coming Into a Mirror Parallel to the Principal Axis |
9:14 | |
| |
| Light Rays Passing Through the Center of Curvature |
10:17 | |
| |
| Light Rays From the Object Passing Directly Through the Focal Point |
10:52 | |
| |
Mirror Equation (Lens Equation) |
12:06 | |
| |
| Object and Image Distances Are Positive on the Reflecting Side of the Mirror |
12:13 | |
| |
| Formula |
12:19 | |
| |
Concave Mirror with Object Inside f |
12:39 | |
| |
Example 4: Concave Spherical Mirror |
14:21 | |
| |
Example 5: Image From a Concave Mirror |
14:51 | |
| |
Convex (Diverging) Spherical Mirrors |
16:29 | |
| |
| Light Rays Coming Into a Mirror Parallel to the Principal Axis |
16:37 | |
| |
| Light Rays Striking the Center of the Mirror |
16:50 | |
| |
| Light Rays Never Converge on the Reflective Side of a Convex Mirror |
16:54 | |
| |
Convex Mirror Ray Tracing |
17:07 | |
| |
Example 6: Diverging Rays |
19:12 | |
| |
Example 7: Focal Length |
19:28 | |
| |
Example 8: Reflected Sonar Wave |
19:53 | |
| |
Example 9: Plane Mirror Image Distance |
20:20 | |
| |
Example 10: Image From a Concave Mirror |
21:23 | |
| |
Example 11: Converging Mirror Image Distance |
23:09 | |
|
Refraction & Lenses |
39:42 |
| |
Intro |
0:00 | |
| |
Objectives |
0:09 | |
| |
Refraction |
0:42 | |
| |
| When a Wave Reaches a Boundary Between Media, Part of the Wave is Reflected and Part of the Wave Enters the New Medium |
0:43 | |
| |
| Wavelength Must Change If the Wave's Speed Changes |
0:57 | |
| |
| Refraction is When This Causes The Wave to Bend as It Enters the New Medium |
1:12 | |
| |
Marching Band Analogy |
1:22 | |
| |
Index of Refraction |
2:37 | |
| |
| Measure of How Much Light Slows Down in a Material |
2:40 | |
| |
| Ratio of the Speed of an EM Wave in a Vacuum to the Speed of an EM Wave in Another Material is Known as Index of Refraction |
3:03 | |
| |
Indices of Refraction |
3:21 | |
| |
Dispersion |
4:01 | |
| |
| White Light is Refracted Twice in Prism |
4:23 | |
| |
| Index of Refraction of the Prism Material Varies Slightly with Respect to Frequency |
4:41 | |
| |
Example 1: Determining n |
5:14 | |
| |
Example 2: Light in Diamond and Crown Glass |
5:55 | |
| |
Snell's Law |
6:24 | |
| |
| The Amount of a Light Wave Bends As It Enters a New Medium is Given by the Law of Refraction |
6:32 | |
| |
| Light Bends Toward the Normal as it Enters a Material With a Higher n |
7:08 | |
| |
| Light Bends Toward the Normal as it Enters a Material With a Lower n |
7:14 | |
| |
Example 3: Angle of Refraction |
7:42 | |
| |
Example 4: Changes with Refraction |
9:31 | |
| |
Total Internal Reflection |
10:10 | |
| |
| When the Angle of Refraction Reaches 90 Degrees |
10:23 | |
| |
| Critical Angle |
10:34 | |
| |
| Total Internal Reflection |
10:51 | |
| |
Applications of TIR |
12:13 | |
| |
Example 5: Critical Angle of Water |
13:17 | |
| |
Thin Lenses |
14:15 | |
| |
| Convex Lenses |
14:22 | |
| |
| Concave Lenses |
14:31 | |
| |
Convex Lenses |
15:24 | |
| |
| Rays Parallel to the Principal Axis are Refracted Through the Far Focal Point of the Lens |
15:28 | |
| |
| A Ray Drawn From the Object Through the Center of the Lens Passes Through the Center of the Lens Unbent |
15:53 | |
| |
Example 6: Converging Lens Image |
16:46 | |
| |
Example 7: Image Distance of Convex Lens |
17:18 | |
| |
Concave Lenses |
18:21 | |
| |
| Rays From the Object Parallel to the Principal Axis Are Refracted Away from the Principal Axis on a Line from the Near Focal Point Through the Point Where the Ray Intercepts the Center of the Lens |
18:25 | |
| |
| Concave Lenses Produce Upright, Virtual, Reduced Images |
20:30 | |
| |
Example 8: Light Ray Thought a Lens |
20:36 | |
| |
Systems of Optical Elements |
21:05 | |
| |
| Find the Image of the First Optical Elements and Utilize It as the Object of the Second Optical Element |
21:16 | |
| |
Example 9: Lens and Mirrors |
21:35 | |
| |
Thin Film Interference |
27:22 | |
| |
| When Light is Incident Upon a Thin Film, Some Light is Reflected and Some is Transmitted Into the Film |
27:25 | |
| |
| If the Transmitted Light is Again Reflected, It Travels Back Out of the Film and Can Interfere |
27:31 | |
| |
| Phase Change for Every Reflection from Low-Index to High-Index |
28:09 | |
| |
Example 10: Thin Film Interference |
28:41 | |
| |
Example 11: Wavelength in Diamond |
32:07 | |
| |
Example 12: Light Incident on Crown Glass |
33:57 | |
| |
Example 13: Real Image from Convex Lens |
34:44 | |
| |
Example 14: Diverging Lens |
35:45 | |
| |
Example 15: Creating Enlarged, Real Images |
36:22 | |
| |
Example 16: Image from a Converging Lens |
36:48 | |
| |
Example 17: Converging Lens System |
37:50 | |
|
Wave-Particle Duality |
23:47 |
| |
Intro |
0:00 | |
| |
Objectives |
0:11 | |
| |
Duality of Light |
0:37 | |
| |
| Photons |
0:47 | |
| |
| Dual Nature |
0:53 | |
| |
| Wave Evidence |
1:00 | |
| |
| Particle Evidence |
1:10 | |
| |
Blackbody Radiation & the UV Catastrophe |
1:20 | |
| |
| Very Hot Objects Emitted Radiation in a Specific Spectrum of Frequencies and Intensities |
1:25 | |
| |
| Color Objects Emitted More Intensity at Higher Wavelengths |
1:45 | |
| |
Quantization of Emitted Radiation |
1:56 | |
| |
Photoelectric Effect |
2:38 | |
| |
| EM Radiation Striking a Piece of Metal May Emit Electrons |
2:41 | |
| |
| Not All EM Radiation Created Photoelectrons |
2:49 | |
| |
Photons of Light |
3:23 | |
| |
| Photon Has Zero Mass, Zero Charge |
3:32 | |
| |
| Energy of a Photon is Quantized |
3:36 | |
| |
| Energy of a Photon is Related to its Frequency |
3:41 | |
| |
Creation of Photoelectrons |
4:17 | |
| |
| Electrons in Metals Were Held in 'Energy Walls' |
4:20 | |
| |
| Work Function |
4:32 | |
| |
| Cutoff Frequency |
4:54 | |
| |
Kinetic Energy of Photoelectrons |
5:14 | |
| |
| Electron in a Metal Absorbs a Photon with Energy Greater Than the Metal's Work Function |
5:16 | |
| |
| Electron is Emitted as a Photoelectron |
5:24 | |
| |
| Any Absorbed Energy Beyond That Required to Free the Electron is the KE of the Photoelectron |
5:28 | |
| |
Photoelectric Effect in a Circuit |
6:37 | |
| |
Compton Effect |
8:28 | |
| |
| Less of Energy and Momentum |
8:49 | |
| |
| Lost by X-Ray Equals Energy and Gained by Photoelectron |
8:52 | |
| |
| Compton Wavelength |
9:09 | |
| |
| Major Conclusions |
9:36 | |
| |
De Broglie Wavelength |
10:44 | |
| |
| Smaller the Particle, the More Apparent the Wave Properties |
11:03 | |
| |
| Wavelength of a Moving Particle is Known as Its de Broglie Wavelength |
11:07 | |
| |
Davisson-Germer Experiment |
11:29 | |
| |
| Verifies Wave Nature of Moving Particles |
11:30 | |
| |
| Shoot Electrons at Double Slit |
11:34 | |
| |
Example 1 |
11:46 | |
| |
Example 2 |
13:07 | |
| |
Example 3 |
13:48 | |
| |
Example 4A |
15:33 | |
| |
Example 4B |
18:47 | |
| |
Example 5: Wave Nature of Light |
19:54 | |
| |
Example 6: Moving Electrons |
20:43 | |
| |
Example 7: Wavelength of an Electron |
21:11 | |
| |
Example 8: Wrecking Ball |
22:50 | |
Section 7: Modern Physics |
|
Atomic Energy Levels |
14:21 |
| |
Intro |
0:00 | |
| |
Objectives |
0:09 | |
| |
Rutherford's Gold Foil Experiment |
0:35 | |
| |
| Most of the Particles Go Through Undeflected |
1:12 | |
| |
| Some Alpha Particles Are Deflected Large Amounts |
1:15 | |
| |
| Atoms Have a Small, Massive, Positive Nucleus |
1:20 | |
| |
| Electrons Orbit the Nucleus |
1:23 | |
| |
| Most of the Atom is Empty Space |
1:26 | |
| |
Problems with Rutherford's Model |
1:31 | |
| |
| Charges Moving in a Circle Accelerate, Therefore Classical Physics Predicts They Should Release Photons |
1:39 | |
| |
| Lose Energy When They Release Photons |
1:46 | |
| |
| Orbits Should Decay and They Should Be Unstable |
1:50 | |
| |
Bohr Model of the Atom |
2:09 | |
| |
| Electrons Don't Lose Energy as They Accelerate |
2:20 | |
| |
| Each Atom Allows Only a Limited Number of Specific Orbits at Each Energy Level |
2:35 | |
| |
| Electrons Must Absorb or Emit a Photon of Energy to Change Energy Levels |
2:40 | |
| |
Energy Level Diagrams |
3:29 | |
| |
| n=1 is the Lowest Energy State |
3:34 | |
| |
| Negative Energy Levels Indicate Electron is Bound to Nucleus of the Atom |
4:03 | |
| |
| When Electron Reaches 0 eV It Is No Longer Bound |
4:20 | |
| |
Electron Cloud Model (Probability Model) |
4:46 | |
| |
| Electron Only Has A Probability of Being Located in Certain Regions Surrounding the Nucleus |
4:53 | |
| |
| Electron Orbitals Are Probability Regions |
4:58 | |
| |
Atomic Spectra |
5:16 | |
| |
| Atoms Can Only Emit Certain Frequencies of Photons |
5:19 | |
| |
| Electrons Can Only Absorb Photons With Energy Equal to the Difference in Energy Levels |
5:34 | |
| |
| This Leads to Unique Atomic Spectra of Emitted and Absorbed Radiation for Each Element |
5:37 | |
| |
| Incandescence Emits a Continuous Energy |
5:43 | |
| |
| If All Colors of Light Are Incident Upon a Cold Gas, The Gas Only Absorbs Frequencies Corresponding to Photon Energies Equal to the Difference Between the Gas's Atomic Energy Levels |
6:16 | |
| |
| Continuous Spectrum |
6:42 | |
| |
| Absorption Spectrum |
6:50 | |
| |
| Emission Spectrum |
7:08 | |
| |
X-Rays |
7:36 | |
| |
| The Photoelectric Effect in Reverse |
7:38 | |
| |
| Electrons Are Accelerated Through a Large Potential Difference and Collide with a Molybdenum or Platinum Plate |
7:53 | |
| |
Example 1: Electron in Hydrogen Atom |
8:24 | |
| |
Example 2: EM Emission in Hydrogen |
10:05 | |
| |
Example 3: Photon Frequencies |
11:30 | |
| |
Example 4: Bright-Line Spectrum |
12:24 | |
| |
Example 5: Gas Analysis |
13:08 | |
|
Nuclear Physics |
15:47 |
| |
Intro |
0:00 | |
| |
Objectives |
0:08 | |
| |
The Nucleus |
0:33 | |
| |
| Protons Have a Charge or +1 e |
0:39 | |
| |
| Neutrons Are Neutral (0 Charge) |
0:42 | |
| |
| Held Together by the Strong Nuclear Force |
0:43 | |
| |
Example 1: Deconstructing an Atom |
1:20 | |
| |
Mass-Energy Equivalence |
2:06 | |
| |
| Mass is a Measure of How Much Energy an Object Contains |
2:16 | |
| |
| Universal Conservation of Laws |
2:31 | |
| |
Nuclear Binding Energy |
2:53 | |
| |
| A Strong Nuclear Force Holds Nucleons Together |
3:04 | |
| |
| Mass of the Individual Constituents is Greater Than the Mass of the Combined Nucleus |
3:19 | |
| |
| Binding Energy of the Nucleus |
3:32 | |
| |
| Mass Defect |
3:37 | |
| |
Nuclear Decay |
4:30 | |
| |
| Alpha Decay |
4:42 | |
| |
| Beta Decay |
5:09 | |
| |
| Gamma Decay |
5:46 | |
| |
Fission |
6:40 | |
| |
| The Splitting of a Nucleus Into Two or More Nuclei |
6:42 | |
| |
| For Larger Nuclei, the Mass of Original Nucleus is Greater Than the Sum of the Mass of the Products When Split |
6:47 | |
| |
Fusion |
8:14 | |
| |
| The Process of Combining Two Or More Smaller Nuclei Into a Larger Nucleus |
8:15 | |
| |
| This Fuels Our Sun and Stars |
8:28 | |
| |
| Basis of Hydrogen Bomb |
8:31 | |
| |
Forces in the Universe |
9:00 | |
| |
| Strong Nuclear Force |
9:06 | |
| |
| Electromagnetic Force |
9:13 | |
| |
| Weak Nuclear Force |
9:22 | |
| |
| Gravitational Force |
9:27 | |
| |
Example 2: Deuterium Nucleus |
9:39 | |
| |
Example 3: Particle Accelerator |
10:24 | |
| |
Example 4: Tritium Formation |
12:03 | |
| |
Example 5: Beta Decay |
13:02 | |
| |
Example 6: Gamma Decay |
14:15 | |
| |
Example 7: Annihilation |
14:39 | |
Section 8: Sample AP Exams |
|
AP Practice Exam: Multiple Choice, Part 1 |
38:01 |
| |
Intro |
0:00 | |
| |
Problem 1 |
1:33 | |
| |
Problem 2 |
1:57 | |
| |
Problem 3 |
2:50 | |
| |
Problem 4 |
3:46 | |
| |
Problem 5 |
4:13 | |
| |
Problem 6 |
4:41 | |
| |
Problem 7 |
6:12 | |
| |
Problem 8 |
6:49 | |
| |
Problem 9 |
7:49 | |
| |
Problem 10 |
9:31 | |
| |
Problem 11 |
10:08 | |
| |
Problem 12 |
11:03 | |
| |
Problem 13 |
11:30 | |
| |
Problem 14 |
12:28 | |
| |
Problem 15 |
14:04 | |
| |
Problem 16 |
15:05 | |
| |
Problem 17 |
15:55 | |
| |
Problem 18 |
17:06 | |
| |
Problem 19 |
18:43 | |
| |
Problem 20 |
19:58 | |
| |
Problem 21 |
22:03 | |
| |
Problem 22 |
22:49 | |
| |
Problem 23 |
23:28 | |
| |
Problem 24 |
24:04 | |
| |
Problem 25 |
25:07 | |
| |
Problem 26 |
26:46 | |
| |
Problem 27 |
28:03 | |
| |
Problem 28 |
28:49 | |
| |
Problem 29 |
30:20 | |
| |
Problem 30 |
31:10 | |
| |
Problem 31 |
32:63 | |
| |
Problem 32 |
33:46 | |
| |
Problem 33 |
34:47 | |
| |
Problem 34 |
36:07 | |
| |
Problem 35 |
36:44 | |
|
AP Practice Exam: Multiple Choice, Part 2 |
37:49 |
| |
Intro |
0:00 | |
| |
Problem 36 |
0:18 | |
| |
Problem 37 |
0:42 | |
| |
Problem 38 |
2:13 | |
| |
Problem 39 |
4:10 | |
| |
Problem 40 |
4:47 | |
| |
Problem 41 |
5:52 | |
| |
Problem 42 |
7:22 | |
| |
Problem 43 |
8:16 | |
| |
Problem 44 |
9:11 | |
| |
Problem 45 |
9:42 | |
| |
Problem 46 |
10:56 | |
| |
Problem 47 |
12:03 | |
| |
Problem 48 |
13:58 | |
| |
Problem 49 |
14:49 | |
| |
Problem 50 |
15:36 | |
| |
Problem 51 |
15:51 | |
| |
Problem 52 |
17:18 | |
| |
Problem 53 |
17:59 | |
| |
Problem 54 |
19:10 | |
| |
Problem 55 |
21:27 | |
| |
Problem 56 |
22:40 | |
| |
Problem 57 |
23:19 | |
| |
Problem 58 |
23:50 | |
| |
Problem 59 |
25:35 | |
| |
Problem 60 |
26:45 | |
| |
Problem 61 |
27:57 | |
| |
Problem 62 |
28:32 | |
| |
Problem 63 |
29:52 | |
| |
Problem 64 |
30:27 | |
| |
Problem 65 |
31:27 | |
| |
Problem 66 |
32:22 | |
| |
Problem 67 |
33:18 | |
| |
Problem 68 |
35:21 | |
| |
Problem 69 |
36:27 | |
| |
Problem 70 |
36:46 | |
|
AP Practice Exam: Free Response, Part 1 |
16:53 |
| |
Intro |
0:00 | |
| |
Question 1 |
0:23 | |
| |
Question 2 |
8:55 | |
|
AP Practice Exam: Free Response, Part 2 |
9:20 |
| |
Intro |
0:00 | |
| |
Question 3 |
0:14 | |
| |
Question 4 |
4:34 | |
|
AP Practice Exam: Free Response, Part 3 |
18:12 |
| |
Intro |
0:00 | |
| |
Question 5 |
0:15 | |
| |
Question 6 |
3:29 | |
| |
Question 7 |
6:18 | |
| |
Question 8 |
12:53 | |
Section 9: Additional Examples |
|
Metric Estimation |
3:53 |
| |
Intro |
0:00 | |
| |
Question 1 |
0:38 | |
| |
Question 2 |
0:51 | |
| |
Question 3 |
1:09 | |
| |
Question 4 |
1:24 | |
| |
Question 5 |
1:49 | |
| |
Question 6 |
2:11 | |
| |
Question 7 |
2:27 | |
| |
Question 8 |
2:49 | |
| |
Question 9 |
3:03 | |
| |
Question 10 |
3:23 | |
|
Defining Motion |
7:06 |
| |
Intro |
0:00 | |
| |
Question 1 |
0:13 | |
| |
Question 2 |
0:50 | |
| |
Question 3 |
1:56 | |
| |
Question 4 |
2:24 | |
| |
Question 5 |
3:32 | |
| |
Question 6 |
4:01 | |
| |
Question 7 |
5:36 | |
| |
Question 8 |
6:36 | |
|
Motion Graphs |
6:48 |
| |
Intro |
0:00 | |
| |
Question 1 |
0:13 | |
| |
Question 2 |
2:01 | |
| |
Question 3 |
3:06 | |
| |
Question 4 |
3:41 | |
| |
Question 5 |
4:30 | |
| |
Question 6 |
5:52 | |
|
Horizontal Kinematics |
8:16 |
| |
Intro |
0:00 | |
| |
Question 1 |
0:19 | |
| |
Question 2 |
2:19 | |
| |
Question 3 |
3:16 | |
| |
Question 4 |
4:36 | |
| |
Question 5 |
6:43 | |
|
Free Fall |
7:56 |
| |
Intro |
0:00 | |
| |
Question 1-4 |
0:12 | |
| |
Question 5 |
2:36 | |
| |
Question 6 |
3:11 | |
| |
Question 7 |
4:44 | |
| |
Question 8 |
6:16 | |
|
Projectile Motion |
4:17 |
| |
Intro |
0:00 | |
| |
Question 1 |
0:13 | |
| |
Question 2 |
0:45 | |
| |
Question 3 |
1:25 | |
| |
Question 4 |
2:00 | |
| |
Question 5 |
2:32 | |
| |
Question 6 |
3:38 | |
|
Newton's 1st Law |
4:34 |
| |
Intro |
0:00 | |
| |
Question 1 |
0:15 | |
| |
Question 2 |
1:02 | |
| |
Question 3 |
1:50 | |
| |
Question 4 |
2:04 | |
| |
Question 5 |
2:26 | |
| |
Question 6 |
2:54 | |
| |
Question 7 |
3:11 | |
| |
Question 8 |
3:29 | |
| |
Question 9 |
3:47 | |
| |
Question 10 |
4:02 | |
|
Newton's 2nd Law |
5:40 |
| |
Intro |
0:00 | |
| |
Question 1 |
0:16 | |
| |
Question 2 |
0:55 | |
| |
Question 3 |
1:50 | |
| |
Question 4 |
2:40 | |
| |
Question 5 |
3:33 | |
| |
Question 6 |
3:56 | |
| |
Question 7 |
4:29 | |
|
Newton's 3rd Law |
3:44 |
| |
Intro |
0:00 | |
| |
Question 1 |
0:17 | |
| |
Question 2 |
0:44 | |
| |
Question 3 |
1:14 | |
| |
Question 4 |
1:51 | |
| |
Question 5 |
2:11 | |
| |
Question 6 |
2:29 | |
| |
Question 7 |
2:53 | |
|
Friction |
6:37 |
| |
Intro |
0:00 | |
| |
Question 1 |
0:13 | |
| |
Question 2 |
0:47 | |
| |
Question 3 |
1:25 | |
| |
Question 4 |
2:26 | |
| |
Question 5 |
3:43 | |
| |
Question 6 |
4:41 | |
| |
Question 7 |
5:13 | |
| |
Question 8 |
5:50 | |
|
Ramps and Inclines |
6:13 |
| |
Intro |
0:00 | |
| |
Question 1 |
0:18 | |
| |
Question 2 |
1:01 | |
| |
Question 3 |
2:50 | |
| |
Question 4 |
3:11 | |
| |
Question 5 |
5:08 | |
|
Circular Motion |
5:17 |
| |
Intro |
0:00 | |
| |
Question 1 |
0:21 | |
| |
Question 2 |
1:01 | |
| |
Question 3 |
1:50 | |
| |
Question 4 |
2:33 | |
| |
Question 5 |
3:10 | |
| |
Question 6 |
3:31 | |
| |
Question 7 |
3:56 | |
| |
Question 8 |
4:33 | |
|
Gravity |
6:33 |
| |
Intro |
0:00 | |
| |
Question 1 |
0:19 | |
| |
Question 2 |
1:05 | |
| |
Question 3 |
2:09 | |
| |
Question 4 |
2:53 | |
| |
Question 5 |
3:17 | |
| |
Question 6 |
4:00 | |
| |
Question 7 |
4:41 | |
| |
Question 8 |
5:20 | |
|
Momentum & Impulse |
9:29 |
| |
Intro |
0:00 | |
| |
Question 1 |
0:19 | |
| |
Question 2 |
2:17 | |
| |
Question 3 |
3:25 | |
| |
Question 4 |
3:56 | |
| |
Question 5 |
4:28 | |
| |
Question 6 |
5:04 | |
| |
Question 7 |
6:18 | |
| |
Question 8 |
6:57 | |
| |
Question 9 |
7:47 | |
|
Conservation of Momentum |
9:33 |
| |
Intro |
0:00 | |
| |
Question 1 |
0:15 | |
| |
Question 2 |
2:08 | |
| |
Question 3 |
4:03 | |
| |
Question 4 |
4:10 | |
| |
Question 5 |
6:08 | |
| |
Question 6 |
6:55 | |
| |
Question 7 |
8:26 | |
|
Work & Power |
6:02 |
| |
Intro |
0:00 | |
| |
Question 1 |
0:13 | |
| |
Question 2 |
0:29 | |
| |
Question 3 |
0:55 | |
| |
Question 4 |
1:36 | |
| |
Question 5 |
2:18 | |
| |
Question 6 |
3:22 | |
| |
Question 7 |
4:01 | |
| |
Question 8 |
4:18 | |
| |
Question 9 |
4:49 | |
|
Springs |
7:59 |
| |
Intro |
0:00 | |
| |
Question 1 |
0:13 | |
| |
Question 4 |
2:26 | |
| |
Question 5 |
3:37 | |
| |
Question 6 |
4:39 | |
| |
Question 7 |
5:28 | |
| |
Question 8 |
5:51 | |
|
Energy & Energy Conservation |
8:47 |
| |
Intro |
0:00 | |
| |
Question 1 |
0:18 | |
| |
Question 2 |
1:27 | |
| |
Question 3 |
1:44 | |
| |
Question 4 |
2:33 | |
| |
Question 5 |
2:44 | |
| |
Question 6 |
3:33 | |
| |
Question 7 |
4:41 | |
| |
Question 8 |
5:19 | |
| |
Question 9 |
5:37 | |
| |
Question 10 |
7:12 | |
| |
Question 11 |
7:40 | |
|
Electric Charge |
7:06 |
| |
Intro |
0:00 | |
| |
Question 1 |
0:10 | |
| |
Question 2 |
1:03 | |
| |
Question 3 |
1:32 | |
| |
Question 4 |
2:12 | |
| |
Question 5 |
3:01 | |
| |
Question 6 |
3:49 | |
| |
Question 7 |
4:24 | |
| |
Question 8 |
4:50 | |
| |
Question 9 |
5:32 | |
| |
Question 10 |
5:55 | |
| |
Question 11 |
6:26 | |
|
Coulomb's Law |
4:13 |
| |
Intro |
0:00 | |
| |
Question 1 |
0:14 | |
| |
Question 2 |
0:47 | |
| |
Question 3 |
1:25 | |
| |
Question 4 |
2:25 | |
| |
Question 5 |
3:01 | |
|
Electric Fields & Forces |
4:11 |
| |
Intro |
0:00 | |
| |
Question 1 |
0:19 | |
| |
Question 2 |
0:51 | |
| |
Question 3 |
1:30 | |
| |
Question 4 |
2:19 | |
| |
Question 5 |
3:12 | |
|
Electric Potential |
5:12 |
| |
Intro |
0:00 | |
| |
Question 1 |
0:14 | |
| |
Question 2 |
0:42 | |
| |
Question 3 |
1:08 | |
| |
Question 4 |
1:43 | |
| |
Question 5 |
2:22 | |
| |
Question 6 |
2:49 | |
| |
Question 7 |
3:14 | |
| |
Question 8 |
4:02 | |
|
Electrical Current |
6:54 |
| |
Intro |
0:00 | |
| |
Question 1 |
0:13 | |
| |
Question 2 |
0:42 | |
| |
Question 3 |
2:01 | |
| |
Question 4 |
3:02 | |
| |
Question 5 |
3:52 | |
| |
Question 6 |
4:15 | |
| |
Question 7 |
4:37 | |
| |
Question 8 |
4:59 | |
| |
Question 9 |
5:50 | |
|
Resistance |
5:15 |
| |
Intro |
0:00 | |
| |
Question 1 |
0:12 | |
| |
Question 2 |
0:53 | |
| |
Question 3 |
1:44 | |
| |
Question 4 |
2:31 | |
| |
Question 5 |
3:21 | |
| |
Question 6 |
4:06 | |
|
Ohm's Law |
4:27 |
| |
Intro |
0:00 | |
| |
Question 1 |
0:12 | |
| |
Question 2 |
0:33 | |
| |
Question 3 |
0:59 | |
| |
Question 4 |
1:32 | |
| |
Question 5 |
1:56 | |
| |
Question 6 |
2:50 | |
| |
Question 7 |
3:19 | |
| |
Question 8 |
3:50 | |
|
Circuit Analysis |
6:36 |
| |
Intro |
0:00 | |
| |
Question 1 |
0:12 | |
| |
Question 2 |
2:16 | |
| |
Question 3 |
2:33 | |
| |
Question 4 |
2:42 | |
| |
Question 5 |
3:18 | |
| |
Question 6 |
5:51 | |
| |
Question 7 |
6:00 | |
|
Magnetism |
3:43 |
| |
Intro |
0:00 | |
| |
Question 1 |
0:16 | |
| |
Question 2 |
0:31 | |
| |
Question 3 |
0:56 | |
| |
Question 4 |
1:19 | |
| |
Question 5 |
1:35 | |
| |
Question 6 |
2:36 | |
| |
Question 7 |
3:03 | |
|
Wave Basics |
4:21 |
| |
Intro |
0:00 | |
| |
Question 1 |
0:13 | |
| |
Question 2 |
0:36 | |
| |
Question 3 |
0:47 | |
| |
Question 4 |
1:13 | |
| |
Question 5 |
1:27 | |
| |
Question 6 |
1:39 | |
| |
Question 7 |
1:54 | |
| |
Question 8 |
2:22 | |
| |
Question 9 |
2:51 | |
| |
Question 10 |
3:32 | |
|
Wave Characteristics |
5:33 |
| |
Intro |
0:00 | |
| |
Question 1 |
0:23 | |
| |
Question 2 |
1:04 | |
| |
Question 3 |
2:01 | |
| |
Question 4 |
2:50 | |
| |
Question 5 |
3:12 | |
| |
Question 6 |
3:57 | |
| |
Question 7 |
4:16 | |
| |
Question 8 |
4:42 | |
| |
Question 9 |
4:56 | |
|
Wave Behaviors |
3:52 |
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Intro |
0:00 | |
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Question 1 |
0:13 | |
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Question 2 |
0:40 | |
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Question 3 |
1:04 | |
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Question 4 |
1:17 | |
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Question 5 |
1:39 | |
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Question 6 |
2:07 | |
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Question 7 |
2:41 | |
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Question 8 |
3:09 | |
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Reflection |
3:48 |
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Intro |
0:00 | |
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Question 1 |
0:12 | |
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Question 2 |
0:50 | |
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Question 3 |
1:29 | |
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Question 4 |
1:46 | |
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Question 5 |
3:08 | |
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Refraction |
2:49 |
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Intro |
0:00 | |
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Question 1 |
0:29 | |
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Question 5 |
1:03 | |
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Question 6 |
1:24 | |
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Question 7 |
2:01 | |
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Diffraction |
2:34 |
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Intro |
0:00 | |
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Question 1 |
0:16 | |
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Question 2 |
0:31 | |
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Question 3 |
0:50 | |
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Question 4 |
1:05 | |
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Question 5 |
1:37 | |
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Question 6 |
2:04 | |
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Electromagnetic Spectrum |
7:06 |
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Intro |
0:00 | |
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Question 1 |
0:24 | |
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Question 2 |
0:39 | |
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Question 3 |
1:05 | |
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Question 4 |
1:51 | |
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Question 5 |
2:03 | |
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Question 6 |
2:58 | |
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Question 7 |
3:14 | |
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Question 8 |
3:52 | |
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Question 9 |
4:30 | |
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Question 10 |
5:04 | |
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Question 11 |
6:01 | |
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Question 12 |
6:16 | |
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Wave-Particle Duality |
5:30 |
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Intro |
0:00 | |
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Question 1 |
0:15 | |
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Question 2 |
0:34 | |
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Question 3 |
0:53 | |
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Question 4 |
1:54 | |
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Question 5 |
2:16 | |
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Question 6 |
2:27 | |
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Question 7 |
2:42 | |
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Question 8 |
2:59 | |
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Question 9 |
3:45 | |
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Question 10 |
4:13 | |
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Question 11 |
4:33 | |
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Energy Levels |
8:13 |
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Intro |
0:00 | |
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Question 1 |
0:25 | |
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Question 2 |
1:18 | |
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Question 3 |
1:43 | |
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Question 4 |
2:08 | |
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Question 5 |
3:17 | |
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Question 6 |
3:54 | |
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Question 7 |
4:40 | |
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Question 8 |
5:15 | |
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Question 9 |
5:54 | |
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Question 10 |
6:41 | |
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Question 11 |
7:14 | |
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Mass-Energy Equivalence |
8:15 |
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Intro |
0:00 | |
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Question 1 |
0:19 | |
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Question 2 |
1:02 | |
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Question 3 |
1:37 | |
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Question 4 |
2:17 | |
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Question 5 |
2:55 | |
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Question 6 |
3:32 | |
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Question 7 |
4:13 | |
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Question 8 |
5:04 | |
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Question 9 |
5:29 | |
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Question 10 |
5:58 | |
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Question 11 |
6:48 | |
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Question 12 |
7:39 | |