Calculate the energy released in joules when 5 g of a material is completely converted into energy during a nuclear reaction.
Mass of material,
m = 5g = 0.005kg,
Speed of light, c = 3 x 108m/s
We know that, E = mc2
E = 0.005 x (3 x 108)2
E = 4.5 x 1014J
Hence, energy released= 4.5 × 1014J