How-much-energy is released when 1 mg of uranium is completely destroyed in an atom bomb ?

Explanation

We are given: `m = 1 mg = 10^(-3) g = 10^(-6) kg , c = 3 xx 10^(8) ms^(-1)`
We are to calculate, E.
Using relation: `E = mc^2`, we get, `E = 10 xx (3 xx 10^8)^2 = 9 xx 10^10J`.