problem43_68

problem43_68 - extra figures in the exponent to avoid...

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43.68: The activity of the sample will have decreased by a factor of ; 2 10 097 . 1 60s) min 1 ( min) counts 5 . 8 ( Ci) Bq 10 (3.70 Ci) 10 2 . 4 ( 06 . 20 6 10 6 = × = × × - this corresponds to 20.06 half-lifes, and the elapsed time is 40.1 h. Note the retention of
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Unformatted text preview: extra figures in the exponent to avoid roundoff error. To the given two figures the time is 40 h....
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