Physical Science Energy

Post by Summer Breeze on June 29, 2016

Hello Summer, This is another good course offered on Educator.com. The information is well broken down. Anway, I would like to know the following: 1) After calculating using the Kinetic Energy formular, what should I derive from the answer. In fact when, do I need to apply KE formula and why? 2) I really appreciate the theories or concepts of this course, is there any way you can include more math problems related to these concepts. I feel that is what I lack when it comes to science; meaning how it is applied when making rational decisions using Math and Science. thanks

Post by Shahram Ahmadi N. Emran on June 8, 2015

Pictures are ok, but so is her word patterns and examples. I like her as my teacher lol

Post by Yisrael Harris on December 13, 2013

When energy is stored in a rubber band or spring, some mechanism is required to prevent its being released until we want it to be released. For example, I could compress a spring and then put a heavy object on it in order to prevent it from springing open. Or I could stretch a rubber band and hold it stretched in order to maintain it at that position. So, again, in the case of nuclear energy, what is the mechanism that is preventing the nuclear energy from being released? And since the amount of energy released in nuclear energy is huge, I would think that the mechanism responsible for preventing the release of that nuclear energy would need to be very great, although this might be incorrect.

Post by Yisrael Harris on December 13, 2013

In the case of a rubber band or a spring, work has gone into storing the potential energy, and I imagine that the energy that will be released in releasing that stored energy will be equal to the work that was required to initially stored. So is the same true in nuclear energy? Meaning that I understand that when nuclear energy is released, the amount of energy released is enormous -- so does this mean that an enormous amount of work was required in order to create the nuclear bonds? If so, when and how did this occur? Do nuclear bonds form today, or did they all get created in some point of time in the very distant past?

Post by Yisrael Harris on December 13, 2013

In the pendulum example, if the ball is initially high, and at the very end, the ball eventually comes to rest at the bottom, then it would seem that there has been a net loss of energy! I imagine that this has to do wih gravity, and that if there were no gravity, the pendulum would continue to swing forever. Nevertheless, where there is gravity, where has this apparent loss of energy gone?

Post by Emily Engle on September 10, 2013

In the kinetic energy formula does the v equal velocity or speed?

Post by Yisrael Harris on April 17, 2013

In the last example, which energy should we use, many of the non-renewable resources are restricted not only in terms of place but also in terms of time (e.g. there is not always wind).

Post by Yisrael Harris on April 16, 2013

When I throw a ball across a room, what transformation of energy has occurred?