An average adult body contains about 0.10Ci of 40/19K, which comes from food. (a) How many decays

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An average adult body contains about 0.10μCi of 40/19K, which comes from food.
(a) How many decays occur per second?
(b) The potassium decays occur per with energies of around 1.4 MeV. Calculate the does per year in sieverts for a 50-kg adult. Is this a significant fraction of the 3.6mSv/year background rate?
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