Mathematics, 31.01.2020 11:01 briarwilliams9668
Cobalt-56 has a decay constant of 8.77 × 10-3 (which is equivalent to a half life of 79 days). how many days will it take for a sample of cobalt-56 to decay to 62% of its original value?
Answers: 3
![\bf 0.62P=P(1-0.00877)^t\implies P=1\implies 0.62=(1-0.00877)^t \\\\\\ ln(0.62)=ln[(1-0.00877)^t]\implies ln(0.62)=t\cdot ln(1-0.00877) \\\\\\ \cfrac{ln(0.62)}{ln(0.99123)}=t](/tpl/images/0489/5470/72aab.png)
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Cobalt-56 has a decay constant of 8.77 × 10-3 (which is equivalent to a half life of 79 days). how m...
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