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Question

The energy released when 10 mg of mass is converted into energy

A
9×1011 J
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B
6×109 J
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C
3×1012 J
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D
7×109 J
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Solution

The correct option is A 9×1011 J
Given:
m=10 mg=10×103×103 kg

m=105 kg ; c=3×108 ms1

According to Einstein's mass energy equivalence,

E=mc2

E=105×(3×108)2

E=9×1011 J

Hence, option (A) is correct.

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