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a Estimate the activity due to the 40K in a
(a) Estimate the activity due to the 40K in a gallon of whole milk. Typically, a gallon contains about 6.4 g of potassium, which includes all the isotopes of potassium that exist naturally. Assume the same percentages for each isotope as given in the Pulling It Together Example at the end of this chapter.
(b) Assume that each decay of a 40K nucleus releases 1.1 MeV of energy into the milk (see the same Example for details). At this rate how long will it take the radioactive decay to heat the milk by exactly 1 °F, assuming the container is perfectly insulated? (Take the specific heat of milk to be the same as that of fresh water.)
(b) Assume that each decay of a 40K nucleus releases 1.1 MeV of energy into the milk (see the same Example for details). At this rate how long will it take the radioactive decay to heat the milk by exactly 1 °F, assuming the container is perfectly insulated? (Take the specific heat of milk to be the same as that of fresh water.)
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