rest energy
Americannoun
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In Special Relativity, the energy corresponding to the rest mass of a body, equal to the rest mass multiplied by the speed of light squared.
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See more at mass-energy equivalence
Etymology
Origin of rest energy
First recorded in 1935–40
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Relativistically, at rest we have rest energy E0 = mc2 .
From Textbooks • Aug. 12, 2015
Find the rest energy in joules and MeV of a proton, given its mass is 1.67×10−27 kg .
From Textbooks • Aug. 12, 2015
Because of the relationship of rest energy to mass, we now consider mass to be a form of energy rather than something separate.
From Textbooks • Aug. 12, 2015
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.