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3 May 2010 Your Guide to Science Projects, Fun Experiments, and Science Research A formula to calculate how old a sample is by carbon-14 dating is: where ln is the natural logarithm, Nf/No is the percent of carbon-14 in the 

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25 Feb 2014 Carbon-14 dating is a radiometric dating technique used to deduce that for any sample of C-14, half of it will decay back into N-14 every 5730 years. . performed an experiment in which 10 pieces of coal were tested in a 

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