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14 September, 11:48

Which of the following does half life measure

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  1. 14 September, 14:10
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    Which of the following does half life measure? It measures the radioactive decay of isotopes of say Pb, Thorium and C14. C14 for example decays to C12 and the rate of decay and the amount of the end product can be used to determine the age of events up to about 40,000 years ago. Pb and Th can be used to measure geological units at least up to 200 or more million years ago.
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