A heavy nucleus at rest breaks into two fragments which fly off with velocities in the ratio 8 : 1. The ratio of radii of the fragments is

The ratio of radii of nuclei  and  is approximately

If Avogadro’s number is 6 × 10²³ then the number of protons, neutrons and electrons in 14 g of ₆C¹⁴ are respectively

Two Cu⁶⁴ nuclei touch each other. The electrostatics repulsive energy of the system will be

When undergoes fission. 0.1% of its original mass is changed into energy. How much energy is released if 1 kg of  undergoes fission

1 g of hydrogen is converted into 0.993 g of helium in a thermonuclear reaction. The energy released is 

The binding energy per nucleon of deuteron  and helium nucleus  is 1.1 MeV and 7 MeV respectively. If two deuteron nuclei react to form a single helium nucleus, then the energy released is

The masses of neutron and proton are 1.0087 amu and 1.0073 amu respectively. If the neutrons and protons combine to form a helium nucleus (alpha particles) of mass 4.0015 amu. The binding energy of the helium nucleus will be [1 amu= 931 MeV]

A atomic power reactor furnace can deliver 300 MW. The energy released due to fission of each of uranium atom  is 170 MeV. The number of uranium atoms fissioned per hour will be

The binding energy per nucleon of O¹⁶ is 7.97 MeV and that of O¹⁷ is 7.75 MeV. The energy (in MeV) required to remove a neutron from O¹⁷ is