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One of the hazards of nuclear explosion is the generation of Sr^90 and its subsequent incorporation in bones. This nuclide has a half life of 28.1 year. Suppose one microgram wasabsorbed by a new born child, how much Sr90 will remain in his bones after 20 years. |
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Answer» Solution :GIVEN `t_(1//2) = 28.1 "year," m_0 = 10^(-6)g, t= 20` year, m = ? `:. T = 2.303/lambda log""m_0/m` `:. 20 = (2.303 xx 28.1)/(0.693) log"" 10^(-6)/m` `:.m = 6.1 xx 10^(-7)g` |
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