A radioactive sample consists of a mixture of S-35 and P-32. Initially, 5% of the activity is due to the S-35 and 95% due to the P-32. At what subsequent time will the activities of the two radionuclides in the sample be equal?© BrainMass Inc. brainmass.com March 4, 2021, 6:10 pm ad1c9bdddf
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The rate for radioactive decay is given by:
n = dN/dt = -alpha(N)(t)
Where alpha is proportionality constant, to be determined from half-life data.
The solution to this differential equation is:
N(t) = (N_0)(e^-(alpha(t)))
Where N_0 is the initial number of radioactive nuclei. ...
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