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The count rate meter is used to measure ...

The count rate meter is used to measure that activity of a given amount of a radio active element. At one instant, the meter shows 475 counts/minute. Exactly 5 minutes later, is shown 270 counts/minute then
Half life of the sample is (in minute)

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To find the half-life of the radioactive sample given the count rates at two different times, we can follow these steps: ### Step-by-Step Solution: 1. **Identify Initial and Final Count Rates**: - At time \( t = 0 \) minutes, the count rate \( N_0 = 475 \) counts/minute. - At time \( t = 5 \) minutes, the count rate \( N = 270 \) counts/minute. ...
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