IB Physics Quiz
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NUCLEAR AND QUANTUM PHYSICS
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A detector measures the activity of a radioactive source over several half-lives. Due to the random nature of radioactive decay, the measured count rate fluctuates. If the true activity at a given moment is 1.6×1041.6 \times 10^4 disintegrations per second, what is the approximate standard deviation in the number of counts detected in a 10-second measurement period?
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