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The activity of a sample of radioactive material is A_1at time t_1 and A_2 at time t_(2)(t_2 gt t_1) . Obtain an expression for its mean life. |
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Answer» SOLUTION :`A_1=A_o E^(-lambdat_1)` and `A_2=A_o e^(-lambdat_2) A_1/A_2=e^(LAMBDA(t_2-t_1))` `lambda(t_2-t_1)=ln|A_1/A_2|` `tau-1/lambda -(t_2-t_1)/(ln|A_1/A_2|)` |
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