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A radioactive substance with decay constant of 0.5s^(-1) is being produced at a constant rate of 50 nuclei per second . If there are no nuclei present initially, the time (in second) after which 25 nuclei will be present is : |
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Answer» 1 `underset(0)OVERSET(N)int (dN)/(50-2N)=underset(0)overset(t)int dt` `RARR N= (100(1-e^(-t//2)))` N=25 `rArr t=2ln ((4)/(3))` |
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