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Why is it difficult to re-use energy once it is in your surroundings?
Wiki User
∙ 12y ago
Entropy always increases :(.
One way of looking at it is all energy wants to be waste heat, and all life and machinery is a system of toll bridges, extracting useful work from the energy on the way to it's final destination.
Once the energy arives, it has no desire to go anywhere so toll bridges don't turn a profit.
Wiki User
∙ 12y ago
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Is electromagnetic energy renewable or nonrenewable?
it is non-renewable, once it is used it can never be used again
Why is heat an unusable energy?
Thermal energy is useful energy. However, thermal energy is usually just heat, and not very hot heat at that. And heat, unless hot enough to boil water is a bit difficult to move and to convert into other kinds of energy. You can't run an electric motor directly off thermal energy for instance. But if you live somewhere where homes needs to be heated as opposed to cooled then thermal energy most certainly can come in handy.
When a flashlight is turned on where does the energy transformation takes places?
The electric energy will be transfered to light energy and heat energy once flashlight turn on.
How is energy lost by movement?
Energy is never actually lost, just transfered from one object to another. The idea that something will lose energy by moving is true, but only because it takes energy to move. If I were to run three miles, I had better be sure that I ate something substantially healthy because if I don't have energy, I may not make it all the way. As I finish running, my energy is released as heat into the biosphere where it will be recycled and used within something else, perhaps taking part in a rainstorm. One way inanimate objects gain and lose energy is through motion. There is a certain level of potential energy that an object has: This is like stored energy based on an object's surroundings when not in motion. Once in motion, that energy transfers to kinetic energy, based on momentum and friction, and is used until the object is no longer in motion, and thus, becomes potential energy once again. This example carries with it a great number of possibilities and variables depending on the circumstances, and therefore, can be analyzed in many other ways.
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