Question

e=mc^2 explain in brief?
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Answer 1

How do I know and which class

Answer 2

Einstein Mass Energy Equivalence equation shows that mass and Energy are interchangeable.

Explanation:

Einstein Mass Energy Equivalence  

 E = mc²

where E = Energy ;  M = mass  ; c = speed of light

In the equation , the increased mass of the body times the speed of light squared is equal to the kinetic energy of that body.

Mass energy equivalence is the principle that anything having mass has an equivalent amount of Energy and vice versa.