Physics
Physics, 23.11.2021 02:00, Parmenter

A rock once contained 1.0 mg of uranium-238, but now contains only 0.25 mg. Given that the half-life for uranium-238 is 4.5 x 109 (4.5 billion) years, how old is the rock?

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A rock once contained 1.0 mg of uranium-238, but now contains only 0.25 mg. Given that the half-life...

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