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The activity of a radioactive sample is ...

The activity of a radioactive sample is measures as `9750` counts/min at `t=0` and as `975` counts/min at `t=5` min. the decay constant is approximately

A

0.922 per minute

B

0.691 per minute

C

0.461 per minute

D

0.230 per minute

Text Solution

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The correct Answer is:
C
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