1. Suppose you know the proportions of a substance at two points in time. Denote the difference between these two points in time with the letter "T. Denote the ratio of the smaller
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An awful lot of statistical manipulation would be involved in arriving at an answer, but you take a known number of atoms of the element and count how many decays occur over a set
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Relative decay rate k =  ln2/5272. The amount of Cobalt60 left after t years given by A(t) = A0e^kt) This implies A(1600) = 100e^ln2*1600/5272) = 81.0290 g.
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Half life=elapsed timexlog2/log (beginning amount/ending amount)
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