(a) Write Einstein's mass-energy equation. Give the meaning of each symbol  which occurs in it.
(b) If 25 atomic mass units (u) of a radioactive material are destroyed in a nuclear reaction, how much energy is released in MeV?

(a) Einstein's mass-energy equation is given as follows:

    E = mc²

Where, E is the amount of energy produced if mass, m is destroyed and c is the speed of light in vacuum.

(b) If 25 atomic mass units (u) of a radioactive material are destroyed in a nuclear reaction, then the amount of energy released in MeV is given by:

$25\times 931=23275MeV$ (since 1 u = 931 MeV)

23275 MeV of energy is released.

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Updated on: 10-Oct-2022

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