One of the main contaminants of a nuclear accident, such as that at Chernobyl, i

Question

One of the main contaminants of a nuclear accident, such as that at Chernobyl, is strontium-90, which decays exponentially at a rate of approximately 2. 5% per year, Write the ratio of strontium- 90 remaining, P , as a function of years, t , since the nuclear accident. P(t) = Estimate the half-life of strontium- 90. Round your answer to the nearest integer. The half-life of strontium- 90 is years. After the Chernobyl disaster, it was predicted that the region would not be safe for human habitation for 100 years. Estimate the percent of original strontium- 90 remaining at this time. Round your answer to the nearest integer. There is about % of original strontium- 90 remaining at this time.

Explanation / Answer

P = P0*e^(-0.025t) so P/Po =e^(-0.025t) b) 1/2 = e^(-0.025t) t = 27.726 years c)P/Po = e^(-0.025 x100) = 0.08208 i.e. 8.208 %

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