The fission of $_{92}^{235}U$ can be triggered by the absorption of a slow neutron by a nucleus. Similarly,a slow proton can also be used. This statement is

The binding energy of deuteron $_1^2H$ is $1.112 \, MeV$ per nucleon and an $\alpha$-particle $_2^4He$ has a binding energy of $7.047 \, MeV$ per nucleon. Then in the fusion reaction $_1^2H + _1^2H \to _2^4He + Q$,the energy $Q$ released is ........ $MeV$.

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

Nuclear fission and fusion can be explained on the basis of

In the Sun,the important source of energy is

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