Example 1:
Consider a radioactive material which is undergoing fusion and resulting in a mass defect of 2 kg. Calculate the amount of energy released from the material.
Solution:
Mass defect, m = 2 kg
Velocity of light, c = 3 х 108 m/s
Using Einstein’s equation,
E = mc2
E = 2 х (3 х 108)2
E = 1.8 х 1017 J

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