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Naturally occurring 40K is listed as responsible for 27 mrem/y of background radiation. Calculate the mass...

Naturally occurring 40K is listed as responsible for 27 mrem/y of background radiation. Calculate the mass of 40K in grams that must be inside the 59 kg body of a woman to produce this dose. Each 40K decay emits a 1.32 MeV β, and 55% of the energy is absorbed inside the body.

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