Question

 Calculate the energy released in joules when 5 g of a material is completely converted into energy doing a nuclear reaction.

Answer 1

The energy released in joules when 5 g (5/1000 kg ) of a material is completely converted into energy during a nuclear reaction is given by Einstein's equation as 

E = mc² 

= `(5/1000) xx (3 xx 10^8)^2`

= 4.5 × 10¹⁴ J