In nuclear fission,the percentage of mass converted into energy is about: (in $\%$)

Thermal neutrons can cause fission in

In a nuclear reactor,the fuel is consumed at the rate of $1 \, mg/s$. The power generated in kilowatt is

In a nuclear reactor, the main purpose of the moderator is to

In the proton-proton cycle, four hydrogen nuclei combine to release energy of ....... $MeV$.

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 ........ $MeV$.