$1 \text{ a.m.u.}$ is equivalent to

If $M_{O}$ is the mass of an oxygen isotope ${ }_{8}^{17}O$ and $M_{p}$ and $M_{N}$ are the mass of a proton and mass of a neutron respectively,then the nuclear binding energy of the isotope is

If mass-energy equivalence is taken into account,when water is cooled to form ice,the mass of water should

The dependence of binding energy per nucleon,$B_N$ on the mass number,$A$,is represented by

Binding energy per nucleon of a fixed nucleus $X^A$ is $8 \ MeV$. It absorbs a neutron moving with kinetic energy $2 \ MeV$ and converts into $Y$,emitting two photons of energy $1 \ MeV$ and $4 \ MeV$ respectively one after the other. The binding energy per nucleon of $Y$ (in $MeV$) is:

If $M(A, Z)$,$M_p$,and $M_n$ represent the masses of the nucleus ${}_{Z}^{A}X$,proton,and neutron in $u$ units respectively $(1u = 931.5 \, MeV/c^2)$,and $BE$ represents the binding energy in $MeV$,then which of the following relations is correct?