How much energy is released by the fusion of four hydrogen atoms to form a helium nucleus (in $MeV$)?

If $5 \ mg$ of ${}^{235}U$ is completely destroyed in an atom bomb,then the approximate total energy released is (given that the energy released per fission is $200 \ MeV$).

What is nuclear fusion? Explain giving its nuclear equations and write down the definition of thermonuclear fusion.

When $_3^7Li$ nuclei are bombarded by protons, and the resultant nuclei are $_4^8Be$, the emitted particles will be

The energy of the fast neutrons emitted in a nuclear fission reactor is approximately $\qquad$ .

$A$ $1000 \; MW$ fission reactor consumes half of its fuel in $5.00 \; y$. How much $_{92}^{235} U$ (in $kg$) did it contain initially? Assume that the reactor operates $80 \%$ of the time, that all the energy generated arises from the fission of $_{92}^{235} U$, and that this nuclide is consumed only by the fission process.