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    Possibility of Perpetual Motion Machine

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    Physicists say that it is impossible to create a perpetual motion machine, a machine whose own activity keeps it running perpetually. What energy principle precludes the possibility of a perpetual motion machine?

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    As far as we understand the laws of the universe, physicists are correct. There must be a renewed source of energy in order for a machine to continually run. How come? The second law of thermodynamics states that the entropy of the universe must increase whenever work is done. That means that the TOTAL entropy of the universe must increase even if the entropy of the system decreases. In other words, in order to ...

    Solution Summary

    The expert determines the possibilities of perpetual motion machines.