10.Use the second law of thermodynamics to explain why energy cannot be recycled.?

Answer 1

Every conversion of energy entails some form of loss of *useable* energy in the form of heat. This is what makes perpetual motion impossible, and for the same reason, if you were to try to recycle energy you would never get as much usable energy out as you put in.

Answer 2

The second law basically states that for every transfer of energy that involves the performance of useful work, a portion of the energy so used MUST be lost as waste heat. There is no way to get around this, it is simply a law of the Universe. This is why when you run fast, your body heats up and then eventually becomes sweaty. This is why your body temperature is always higher than room temperature. This is why cars have radiators. This is why Nuclear reactors have evaporation towers. This is why all air conditioning units must have an outside radiator portion. In all of these cases, if the waste heat were not to be radiated, then the temperature would just keep on building higher and higher until your said unit (your body, your car, your airconditioner, your nuclear reactor, what have you) would just explode or something similar, then finally accomplishing this radiation of its waste heat.
I think the best way to understand it is to imagine that you have a gold mine, and you have a lot of gold at the bottom of a deep hole that you want to get out of the mine(hole). So you arrange a teeter-totter arrangement, so that when you put say 20 lbs of gold on the bottom of the teeter-tooter, you then must add at least 20 lbs of something else at the top of the teeter-totter in order to make it swing the gold upward. The weight at the top must weigh MORE than the gold, or else the gold will not come up out of the mine. Even a tiny extra amount of weight is enough to make the teeter-totter work, but it MUST be MORE than 20 lbs. So you wind up losing a little something with each quantity of gold that you hoist up out of the mine. This is dictated by the second law of thermodynamics. So now let's say you want to "recycle" your energy and use your gold as weight to place on the top of your teeter-totter in order to bring more gold up out of the mine. You will have to have MORE gold going down than comes up! I think you can see why this is a losing proposition. If you carry this experiment to its logical extreme, then all of your gold will wind up at the bottom of the mine. I hope this helps.
P.S. Dr T is not wrong but he misses the point completely. Sure, atoms can exchange energy back and forth to their heart's content, but whenever there is useful work extracted in the process, said atoms will become noticably colder, and some of the energy so liberated MUST be lost to the Universe at large. Any further attempt to extract further useful work from said atoms will just make them get colder and colder, until there is no further work available to extract. In short, you simply can't get something for nothing.

Answer 3

I can provide you with a contrarian view. If energy cannot be recycled, then the existence of stable atoms would be impossible. Stable atoms "recycle" energy from one form to another constantly without decaying, so energy can be recycled.

Answer 4

Do your own homework.