perpetual motion machine of the first kind
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perpetual motion machine of the first kind
[pər′pech·ə·wəl ′mō·shən mə‚shēn əvthə ′fərst ‚kīnd] (physics)
A mechanism which, once set in motion, continues to do useful work without an input of energy, or which produces more energy than is absorbed in its operation; it violates the principle of conservation of energy.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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