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24-06-2019
Physics

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After two half lives, the fraction of nuclei remaining is : (A) 1/2 (B) 1/9 (C) 1/8 (D) 1/4

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MathPhys MathPhys

24-06-2019

Answer:

D

Explanation:

After each half life, half the original amount remains.

So after two half lives, (1/2)^2 remains, or 1/4.

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