(a) Natural potassium contains 40 K, which has a half-life of 1.277 x 10 9 y. What...
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(a) Natural potassium contains 40K, which has a half-life of 1.277 x 109 y. What mass of 40K in a person would have a decay rate of 4140 Bq?
(b) What is the fraction of 40K in natural potassium, given that the person has 140 g in his body? (These numbers are typical for a 70-kg adult.)
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