A researcher analyzes a piece of coal from the age of the dinosaurs (usually taken as about 100 million years old) and measures one decay per minute from the decay of 14C. Based on this and assuming that it was originally decaying at 65536 dpm, the researcher says that 16 half lives have elapsed and it is only 91680 years old. What error has the researcher made?
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When volcanoes erupt, magma (hot, molten rock) rises toward the surface of the earth. as magma cools, solid rock forms. this rock contains substances from the interior of the earth. which of the following natural resources is likely to be plentiful near subduction zones where volcanic activity has occurred in the past?
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A researcher analyzes a piece of coal from the age of the dinosaurs (usually taken as about 100 mill...
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