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The Material Used in Certain Nuclear Bombs Is 239Pu, Which

Question 42

Multiple Choice

The material used in certain nuclear bombs is 239Pu, which has a half-life of about 20,000 years. How long must we wait for a buried stockpile of this substance to decay to 4.0% of its original 239Pu mass?


A) 93,000 y
B) 64,000 y
C) 45,000 y
D) 800 y

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