An atom bomb weighing \( 1 \mathrm{~kg} \) explodes releasing 9 \( ...

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An atom bomb weighing \( 1 \mathrm{~kg} \) explodes releasing 9
\( \mathrm{P} \)
\( \times 10^{13} \mathrm{~J} \) of energy. What percentage of mass is
W
converted into energy?
(1) \( 0.1 \% \)
(2) \( 2 \% \)
(3) \( 1 \% \)
(4) \( 10 \% \)
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