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A radioactive nucleus can decay by three...

A radioactive nucleus can decay by three different processes. Half life for first process is 2 hours . Effective half life of the necleus is `4/3` hours. Find the half for second process in hours.

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The correct Answer is:
4
`lamda=lamda_(1)+lamda_(2)implies1/t=1/(t_(1))+1/(t_(2))implies3/4=1/2+1/(t_(2))impliest_(2)=4` years
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