Problem: A friend claims to have constructed a machine that creates electricity, but requires no energy input.Explain why you should be suspicious of your friends claim.

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The law of conservation of energy states that energy can be neither created nor destroyed.


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A friend claims to have constructed a machine that creates electricity, but requires no energy input.

Explain why you should be suspicious of your friends claim.

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What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Internal Energy concept. You can view video lessons to learn Internal Energy. Or if you need more Internal Energy practice, you can also practice Internal Energy practice problems.