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Modern Physics - Radioactivity

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Please help with the following problem.

The number of unstable nuclei remaining after a time t=5.00 yr is N, and the number present initially is N 0. Find the ratio N/N0 for (a) ^14/6C (half-life=5730 yr), (b) ^15/8O (half-life=122.2x; use t=1.00h, since otherwise the answer is out of the range of your calculator), and (c) ^3/1H (half-life=12.33 yr).

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Problem:The number of unstable nuclei remaining after a time t=5.00 yr is N, and the number present initially is N 0. Find the ratio N/N0 for (a) ^14/6C (half-life=5730 yr), (b) ^15/8O (half-life=122.2x; use t=1.00h, since otherwise the ...

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