mass-energy equation

American

[mas-en-er-jee] / ˈmæsˈɛn ər dʒi /

noun

Physics.

the equation, E=mc2, formulated by Albert Einstein, expressing the equivalence between mass and energy, where E is energy, m is mass, and c is the velocity of light.

Etymology

Origin of mass-energy equation

First recorded in 1940–45

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mass-energy equation

To accommodate the units of the other terms in the mass-energy equation, the mass must be expressed in kg, since 1 J = 1 kg m2/s2.

From Textbooks ● Feb. 14, 2019

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023