Conceptual Physics (12th Edition)

Published by Addison-Wesley
ISBN 10: 0321909100
ISBN 13: 978-0-32190-910-7

Chapter 18 - Think and Explain: 79

Answer

A perpetual motion machine violates the first and second laws of thermodynamics. These laws have enjoyed theoretical support and been confirmed by boatloads of experimental evidence, in every situation considered to date. Though it is very very very remotely possible that these laws will be overturned by a new invention, the US Patent Office would rather not waste its time, and rejects claims of perpetual motion. Physicists consider constructing a perpetual motion machine to be a fool's errand.
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