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You're given a small rock containing an unknown isotope. You place a geiger counter next to and observe 1600 disintegration/sec at t=0 and 300 dis./sec 5 hours later. What is the half life of the isotope and the number of atoms present at t=0? Use calculu to solve
Plz help!
Solve the two equations for α and N[sub]0[/sub]. To find the half-life, substitute N = ½N[sub]0[/sub] in the first equation.
Last edited by JaneFairfax (2007-09-18 22:40:00)
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