1.
The energy released by the fission of one uranium atom is 200MeV200\,\text{MeV}. The number of fissions per second required to produce 3.2W3.2\,\text{W} of power is (Take 1eV=1.6×1019J1\,\text{eV} = 1.6 \times 10^{-19}\,\text{J})