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Question

If 2.9×1017 J of energy is released during a nuclear fission, determine the loss in the mass in kg.

A
5.7 kg
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B
6.4 kg
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C
1.8 kg
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D
3.2 kg
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Solution

The correct option is D 3.2 kg
Given:
Energy released during the fission,E=2.9×1017 J

We know, E=Δmc2
the mass lost, m=Ec2
=2.9×1017(3×108)2

=3.2 kg

3.2 kg of mass is lost in the nuclear fission.

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