perpetual motion
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English[edit]
Noun[edit]
perpetual motion (uncountable)
- (physics) The motion of some hypothetical device that continues forever with no external input of energy, in violation of the laws of thermodynamics.
Usage notes[edit]
- In the literal sense, perpetual motion can exist in an ideal isolated system, such as a single photon moving through empty space. However, a perpetual motion machine which produces work while retaining its kinetic energy is impossible under the known laws of physics.
Derived terms[edit]
Translations[edit]
Translations
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Further reading[edit]
- perpetual motion on Wikipedia.Wikipedia
- Laws of thermodynamics on Wikipedia.Wikipedia