Fewpal
+1 vote
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in Physics by (49.4k points)

The energy equivalent of 0.5 g of a substance is: 

(1) 0.5 × 1013

(2) 4.5 × 1016

(3) 4.5 × 1013

(4) 1.5 × 1013 J

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1 Answer

+1 vote
by (50.0k points)

Correct answer is (3) 4.5 × 1013 J

E = mc2 

= 0.5 × 10–3 × 9 × 1016 

= 4.5 × 1013 J

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