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Question

Physics Question on Nuclei

The energy equivalent to a substance of mass 1 g is

A

18×1013J18 \times 10^{13} J

B

9×1013J9 \times 10^{13} J

C

18×106J18 \times 10^{6} J

D

9×106J9 \times 10^{6} J

Answer

9×1013J9 \times 10^{13} J

Explanation

Solution

E=mc2=1×10−3×(3×108)2E = mc^2 = 1 \times 10^{-3} \times (3 \times 10^8)^2 =9×1013 J= 9 \times 10^{13}\,J