A nuclear explosion results in a mass decrease of $2.10 \mathrm {~g} .$ How much energy is released during this explosion? (c = 3.00 × 10⁸ m/s)

Question

Quizplus · Accepted Answer

The energy released during a mass change can be calculated using Einstein's famous equation of E=mc^2, where E is the energy, m is the mass change and "c" is the speed of light. 
Substituting the given values, 
E = (2.10 × 10^-3 kg) × (3.00 × 10^8 m/s)^2 
E = 1.89 × 10^14 J 
Therefore, the energy released during the nuclear explosion is 1.89 × 10^14 J. The closest match is given in choice A.

A Nuclear Explosion Results in a Mass Decrease Of 2.10 g.2.10 \mathrm {~g} .2.10 g.

A Nuclear Explosion Results in a Mass Decrease Of $2.10 \mathrm {~g} .$