Question

Calculate the energy equivalent of 1 atomic mass unit.

Answer 1

We take, m = 1 amu = 1.66 x 10^-27 kg 

c = 3 x 10⁸ ms^-1 

Then, E = mc² = 1.66 x 10²⁷ x (3 x 10⁸)² J

E ≈ 981 MeV 

∴ 1 amu = 931 MeV.