Answer:
this is the ANS of your first question .. I am writing because and writing option is not coming there..
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E = mc. E = mc2, equation in German-born physicist Albert Einstein's theory of special relativity that expresses the fact that mass and energy are the same physical entity and can be changed into each other.
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The mass defect and binding energy are related by Albert Einstein's formula, E = mc2. In 1905, Einstein developed the special theory of relativity. ... This equation states, a mass (m) can be converted into an amount of energy (E),
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