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Homework Help: Kinetics of Radioactive decay

  1. Apr 23, 2008 #1
    1. surface water contains enough tritium to show 5.5 decays events per minute per 100. g of water. Tritium has a half-life of 12.3 years. You are asked to check a vintage wine that is claimed to have been produced in 1946. How many decay events per minute should you expect to observe in 100.g of that wine?

    I just need someone to point me in the right direction with this. I calculated k, but I'm having trouble figuring out how to get the number of decay events/min. Thanks.
  2. jcsd
  3. Apr 23, 2008 #2
    Do I just do ln(N/5.5 decay events/min x g) = -(.693/12.3)(61 years) and solve for N?
  4. Apr 24, 2008 #3


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    Have you tried? What result are you expecting?
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