Geography, 20.12.2019 08:31 rattler6125
Arock formed with 1,000 atoms of a radioactive parent element, but only contains 125 radioactive parent atoms today. if the half life is 1,000,000 years, how old is the rock?
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When you cross a time zone going east, what happens to the time
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Can someone me with this plz? ! i'm putting 20 points on it!
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Geography, 24.06.2019 08:30, hihihi129473838
Arow of elements on the periodic table is called an
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Arock formed with 1,000 atoms of a radioactive parent element, but only contains 125 radioactive par...
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