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A radioactive nucleus decays by two different processes. The half life for the first process is 10 s and that for the second is 100 s.

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A radioactive nucleus decays by two different processes. The half life for the first process is 10 s and that for the second is 100 s. The effective half life of the nucleus is close to 

(1) 12 sec (2) 9 sec (3) 55 sec (4) 6 sec

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1 Answer

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by (50.4k points)

The correct option is (2) 9 sec.

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