Question

what does E=mc squared mean what does each of those letters mean pls answer fast

Answer 1

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▪️An equation derived by the twentieth-century physicist Albert Einstein, in which E represents units of energy, m represents units of mass, and c2 is the speed of light squared, or multiplied by itself. 

Answer 2

In the equation, the increased relativistic mass (m) of a body times the speed of light squared (c²) is equal to the kinetic energy (E) of that body. In physical theories prior to that of special relativity, mass and energy were viewed as distinct entities.