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Physics 18 Online
OpenStudy (anonymous):

What happens when gasoline is used to power a vehicle? A. Energy is lost as chemical energy transforms to heat energy but gained as heat energy transforms to mechanical. B. Energy is gained as chemical energy transforms to heat energy but lost as heat energy transforms to mechanical. C. Energy is neither lost nor gained as it transforms from chemical, to heat, to mechanical energy. D. Energy is neither lost nor gained as it transforms from chemical, to potential, to electrical energy.

OpenStudy (theeric):

Do you have any clues? Consider the conservation of energy. Consider what type of energies are real, and so can be converted to or transformed into. That should narrow it down to one. Please ask any questions! I might not be around, but others will be!

OpenStudy (theeric):

I shouldn't say which are real... they're all real. I meant, think about what energy conversion is... I'm trying to say that there is one option that, at least in this scenario, has a conversion that doesn't make sense! If you have more questions, please ask! I or someone else will be able to help.

OpenStudy (anonymous):

c

OpenStudy (anonymous):

Do you by any chance remember what the answer was

OpenStudy (theeric):

In our theoretical interpretation of the world around us, energy is never lost nor gained in the big picture due to conservation of energy. While a hot cup of coffee cools, giving energy to the air around it, the coffee loses energy but the air gains \(\it all\) of that energy, so none is lost. So, in the big picture, total energy is a constant. So, it is either (a) or (b) now. Then we need to consider what a gasoline powered vehicle does - it uses "pistons," "valves," and other \(\sf mechanical\) doodads to turn the [transmission which can turn] the wheels. So, we need mechanical energy. Electrical energy doesn't help the gasoline powered car a whole lot. Then we are left with (c), and so I agree with @lilweirdgurl13.

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