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

One of the fusion reactions in the sun is given by ${ }_{1}^{2} H+{ }_{1}^{1} H \rightarrow{ }_{2}^{3} He+\gamma+Q$. Calculate the energy $Q$ released in the reaction. (in $MeV$)

How much energy is produced from the combustion of $1\, kg$ of coal?

Calculate the height of the potential barrier for a head-on collision of two deuterons. (Hint: The height of the potential barrier is given by the Coulomb repulsion between the two deuterons when they just touch each other. Assume that they can be taken as hard spheres of radius $2.0 \; fm$.)

During the fission of $_{92}U^{235}$,$0.1\%$ of its mass is converted into energy. How much energy is produced from $1 \, kg$ of $_{92}U^{235}$?

The average energy of a neutron produced in the fission of ${ }_{92}^{235} U$ is