the activity is A/5. What is the average life time for the sample ?

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A radioactive sample is undergoing α decay. At any time t1, its activity is A and another time t2, the activity is A/5. What is the average life time for the sample ?
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A radioactive sample is undergoing α decay. At any time t1, its activity is A and another time t2, the activity is A/5. What is the average life time for the sample ? A radioactive sample is undergoing α decay. At any time t1 its activity is A and another time t2 the activity is [...]
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