The mass defect in a particular nuclear reaction is 0.3 grams. The amount of ene

Question

The mass defect in a particular nuclear reaction is 0.3 grams. The amount of energy liberated in kilowatt hours is
(Velocity of light =

3 \times 10^{8}

m/s )

Options:

A . 1.5×106

B . 2.5×106

C . 3×106

D . 7.5×106

Answer: Option D
:
D

E = Δ m . c^{2} \Rightarrow E = \frac{0.3}{1000} \times (3 \times 10^{8})^{2} = 2.7 \times 10^{13} J

= \frac{2.7 \times 10^{13}}{3.6 \times 10^{6}} = 7.5 \times 10^{6} k W h

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