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An atom bomb weighing 1 kg explodes releasing $9 × 10^{13}$ joule of energy. What percentage of mass is converted into energy? |
1% 2% 0.1% 10% |
0.1% |
$E = mc^2 = m \times 9\times 10^{16}= 9 \times 10^{13}$ $m = 10^{-3} kg = 0.1\% \text{ of 1 kg}$ |
