A rock recovered from far underground is found to contain 0.86 mg of 238U, 0.15 mg of
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A rock recovered from far underground is found to contain 0.86 mg of 238U, 0.15 mg of 206Pb, and 1.6 mg of 40Ar. How much 40K will it likely contain? Assume that 40K decays to only 40Ar with a half-life of 1.25 x 109 y. Also assume that 238U has a half-life of 4.47 x 109 y.
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We can find the age of the rock from the masses of 238U and 206Pb The initial m...View the full answer
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Related Book For 
Fundamentals of Physics
ISBN: 978-0471758013
8th Extended edition
Authors: Jearl Walker, Halliday Resnick
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