Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Carbon 14 Dating

  1. Nov 30, 2008 #1
    1. The problem statement, all variables and given/known data

    The amount of 14C in an old, isolated sample of vegetation is 0.692 that expected from a present day sample with an equivalent carbon content. Calculate the age of the old sample in years.

    2. Relevant equations

    Im fairly sure you use the following equation to solve this...ln(N/Nsub0)=-.693t/tsub(1/2) ...I could be wrong, because every time I attempt to use it nothing happens haha.

    3. The attempt at a solution
  2. jcsd
  3. Nov 30, 2008 #2
    Try N=No*(1/2)^t/T

    No = original amount of radioactive material
    N = amount of amout of radioactive material remaining after t
    t = time intercal
    T =half life
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook