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Physics - Fundamentals of Physics, I
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OpenStudy (anonymous):
A sample of anorthosite rock returned from the Moon is assayed for uranium and lead. The sample if found to contain 2.18 parts per million ("ppm") uranium and 2.09 ppm lead. What is the age of the rock?
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OpenStudy (theraggedydoctor):
The moon? ;)))) ~moons~
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