Question

methods of dimension and expression for energy where energy depends upon mass frequency and aptitude​

Answer 1

Answer:

The Equivalence of Mass and Energy

First published Wed Sep 12, 2001; substantive revision Thu Aug 15, 2019

Einstein correctly described the equivalence of mass and energy as “the most important upshot of the special theory of relativity” (Einstein 1919), for this result lies at the core of modern physics. Many commentators have observed that in Einstein’s first derivation of this famous result, he did not express it with the equation E=mc2. Instead, Einstein concluded that if an object, which is at rest relative to an inertial frame, either absorbs or emits an amount of energy L, its inertial mass will correspondingly either increase or decrease by an amount L/c2. In