problem43_28 - 43.28 a Solving Eq(43.19 for ln 2 ln 2 T1...

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43.28: a) Solving Eq. (43.19) for λ , . s 10 17 . 4 ) hr sec (3600 ) day hrs 24 )( year days 365 ( ) y 27 . 5 ( 2 ln 2 ln λ 1 9 2 1 - - × = = = T b) . 10 61 . 3 ) g 10 66 . 1 ( ) 60 ( g 10 60 . 3 u 17 24 5 × = × × = = - - A m N c) Bq, 10 51 . 1 λ 9 × = = N dt dN which is d) 0.0408 Ci. The same calculation for radium, with larger A and longer half-life (lower λ ) gives .
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