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Question: A radioactive substance has a half-life of 1 year. The fraction of this material, that would remain after 5 years will be

1) $\frac{1}{{32}}$

2) $\frac{1}{5}$

3) $\frac{1}{2}$

4) $\frac{4}{5}$

Solution:

Explanation: No Explanation

Radioactivity Modern Physics

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