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overset(10^(21)"per sec")rarr A overset(...

`overset(10^(21)"per sec")rarr A overset(lambda = 1/30)rarrB`.
A shows radioactivity disintegration and it is continuosuly produced at the rate of `10^(21)` per sec. Find maximum number of nuclei of A.

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At maximum
`r_"production"=r_"decay"`
`10^21=1/30` N
`rArr N=30xx10^21`.
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