\(\Rightarrow \mathrm{E}=\left(1 \times 10^{-3}\right) \times\left(3 \times 10^5\right)^2 \mathrm{~J}\)
\(\Rightarrow \mathrm{E}=\left(10^{-3}\right)\left(9 \times 10^{16}\right)\left(6.241 \times 10^{18}\right) \mathrm{eV}\)
\(\mathrm{E}=56.169 \times 10^{31} \mathrm{eV}\)
\(\mathrm{E} \approx 5.6 \times 10^{26} \mathrm{MeV}\)
[ $He$ નું દળ $4.0026 \,a.m.u., \,O$ નું દળ $15.9994\, a.m.u.$]