(Answered) Naturally occurring 40k is listed as responsible for 16

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Naturally occurring 40K is listed as responsible for 16 mrem/y of background radiation in Table 30.4. Calculate the mass of 40K that must be inside the 54 kg body of a woman to produce this dose. Each 40K decay emits a 1.30 MeV β, if 40% of this energy is absorbed inside the body.

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