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Question: If ${N_0}$ is the original mass of the substance of half life period ${T_{1/2}} = 5$ years, then the amount of substance left after 15 years is

1) ${N_0}/8$

2) ${N_0}/16$

3) ${N_0}/2$

4) ${N_0}/4$

Solution:

Explanation: No Explanation

Radioactivity Modern Physics

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