A machine can do work by itself
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Perpetual motion is the motion of bodies that continues forever. A perpetual motion machine is a hypothetical machine that can do work infinitely without an energy source. ... A common example is devices powered by ocean currents, whose energy is ultimately derived from the Sun, which itself will eventually burn out
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machine is a hypothetical machine that can do work infinitely without an energy source. ... A common example is devices powered by ocean currents, whose energy is ultimately derived from the Sun, which itself will eventually burn out.
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