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Problem 58 Easy Difficulty

After the sudden release of radioactivity from the Chernobyl nuclear reactor accident in 1986, the radioactivity of milk in Poland rose to $2.00 \times 10^{3} \mathrm{Bq} / \mathrm{L}$ due to iodine-131, with a half - life of 8.04 days. Radioactive iodine is particularly hazardous because the thyroid gland concentrates iodine. The Chernobyl accident caused a measurable increase in thyroid cancers among children in Belarus. (a) For comparison, find the activity of milk due to potassium. Assume 1 liter of milk
contains 2.00 g of potassium, of which 0.011 7% is the isotope $^{40} \mathrm{K},$ which has a half-life of $1.28 \times 10^{9} \mathrm{yr}$ (b) After what length of time would the activity due to iodine fall below that due to potassium?

Answer

a. 60.6 \mathrm{Bq} / \text { Litter }
b. 40.6 d

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Top Physics 103 Educators
Christina K.

Rutgers, The State University of New Jersey

Andy C.

University of Michigan - Ann Arbor

Farnaz M.

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Jared E.

University of Winnipeg

Video Transcript

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National University of Singapore
Top Physics 103 Educators
Christina K.

Rutgers, The State University of New Jersey

Andy C.

University of Michigan - Ann Arbor

Farnaz M.

Other Schools

Jared E.

University of Winnipeg