A nucleus of mass 220 amu in the free state decays to emit an `alpha`-particle . Kinetic energy of the `alpha`-particle emitted is 5.4 MeV. The recoil energy of the daughter nucleus is

A nucleus of mass 218 amu in Free State decays to emit an alpha -particle. Kinetic energy of the beta- particle emitted is 6.7 MeV . The recoil energy (in MeV) of the daughter nucleus is

A nucleus of mass 218 amu is in free state decays to emit an alpha -particle. Kinetic energy of alpha -particle emitted is 6.7Mev. The recoil energy in (MeV) emitted by the daughter nucleus is

A nucleus ""_(Z)X^(A) emits an alpha - particle with the velocity v. The recoil speed of the daughter nucleus is

A stationary nucleus of mass 24 amu emits a gamma photon. The energy of the emitted photon is 7 MeV. The recoil energy of the nucleus is

A stationary nucleus of mass 24 amu emits a gamma photon. The energy of the emitted photon is 7 MeV. The recoil energy of the nucleus is

A stationary radioactive nucleus of mass 210 units disintegrates into an alpha particle of mass 4 units and residual nucleus of mass 206 units. If the kinetic energy of the alpha particle is E, then the kinetic energy of the residual nucleus is