Physics, 30.09.2019 20:00 breadwonders3738
Apaleontologist estimates that when a particular rock formed, it contained 12 mg of the radioactive isotope potassium-40, which has a half-life of 1.26 billion years. the rock now contains 3 mg of the isotope. about how old is the rock? enter in billions of years.
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Apaleontologist estimates that when a particular rock formed, it contained 12 mg of the radioactive...
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