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单词 rest mass
释义

WordReference Random House Unabridged Dictionary of American English © 2024
rest mass′, [Physics.]
  1. Physicsthe mass of a body as measured when the body is at rest relative to an observer, an inherent property of the body. Cf. relativistic mass. 
  • 1910–15

Collins Concise English Dictionary © HarperCollins Publishers::
rest mass n
  1. the mass of an object that is at rest relative to an observer. It is the mass used in Newtonian mechanics
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