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• n  (physics) the principle that a measured quantity of mass is equivalent (according to relativity theory) to a measured quantity of energy

News & Articles

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• 5 things you need to know on Friday
  One of the most well-known physicists of all time, Albert Einstein developed the general theory of relativity, a pillar of modern physics. But, his mass-energy equivalence (E=mc²) may be his best-known work.
  March 14, 2014 - The Bay Bulletin