A sample is counted and found to have 952 counts per minute. Seven minutes later it...

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A sample is counted and found to have 952 counts per minute. Seven minutes later it...

A sample is counted and found to have 952 counts per minute. Seven minutes later it is measured again and has a count of 148 counts per minute. A background measurement gave 6 counts per minute. What is the half-life of the sample?

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Answer 1

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Activity of my time it a radioactive substance at is given by - N=N. At where a = decay Constant ont =N No - No at = lu(No) P Put No=982-6 = 946 Count / min N = 148-6=142 Count /min et = 7 min I 7x ln (2) = 2.56 min. = £ en Iu (94 946 1427 )

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A Geier counter registers a count rate of 6,000 counts per minute from a sample of...

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A sample is counted and found to have 952 counts per minute. Seven minutes later it...

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A sample is counted and found to have 952 counts per minute. Seven minutes later it...