When two nuclei of mass $X$ and $Y$ respectively fuse to form a nucleus of mass $m$ along with the liberation of some energy, then

In a working nuclear reactor,Cadmium rods (control rods) are used to

What is a nuclear reactor? Explain its principle,construction,and working.

Two lighter nuclei combine to form a comparatively heavier nucleus by the relation given below:
${ }_{1}^{2} X +{ }_{1}^{2} X ={ }_{2}^{4} Y$
The binding energies per nucleon of ${ }_{1}^{2} X$ and ${ }_{2}^{4} Y$ are $1.1 \, MeV$ and $7.6 \, MeV$ respectively. The energy released in this process is in $MeV$.

The nuclear fusion reaction is given as $_1H^2 + _1H^2 \to _2He^3 + n + 3.2 \, MeV$. How much energy is released when $2 \, kg$ of deuterium undergoes fusion?

Heavy water is used as a moderator in a nuclear reactor because