- #1
iamalexalright
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Homework Statement
In a sample of one litre of carbon dioxide at STP an average of 5 disintegrations
C -> N + e + v
are observed per minute. Calculate the atomic fraction of C present if the mean lifetime of this nucleus is 8267 years.
Homework Equations
[tex]\tau[/tex] = [tex]\omega[/tex]-1 = 8267 years
N(t) = N0 * [tex]e[/tex]-[tex](\omega[/tex] * t)
The Attempt at a Solution
First I found [tex]\tau[/tex] = 2.607 * 1011 seconds.
And really I'm at a loss of where to go next. I figure N(t)/N0 is what I am looking for but I cannot solve for this without knowing the time t and I do not know where the 5 disintegrations per minute comes in. I'm not looking for an answer(already know it), i just want a little push in the right direction.