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What are the four groups of organic compounds found in living things?
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Radiometric dating is used to tell the absolute age of materials by studying the decay rate of radioactive isotopes. the decay rates of isotopes are constant and are expressed as .
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Awave has a wavelength of 15 mm and a frequency of 6 hertz. what is its speed?
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What are the four groups of organic compounds found in living things?...
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