Anyone heard about the concept of perpetual (zero loss) machines. Are there any studies in this area.

Question

owlfred · Answer

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shadowfiend · Answer

Roughly, yes. The third law of thermodynamics essentially says they are impossible.

anonymous · Answer

perpetual motion machine being impossible, both in theory and in practice, simply due to friction? Because there are substances, such as superfluids, and potentially other forms of matter that could be discovered in the future where there is zero friction, so would it be possible, simply in principle, to create a perpetual motion machine using these substances?

anonymous · Answer

A perpetual motion machine is possible only if it does no work on its surroundings.  That means that it would be pretty useless even if it were possible to build one.