Question

what is E =mc square

Answer 1

it's the Einstein's mass-energy equivalence equation..... where, E=energy
m= mass of an object
c= velocity of the light.... it's value in air is 3x10^8m/s
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thnx for seeing my answer

Answer 2

E =mc ^2

It is a formula which is given by Albert Einstein.
It show relation between Energy, mass of the body and c is equal to speed of light.