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One Material Used in Nuclear Bombs Is 239Pu,with a Half-Life

Question 9

Multiple Choice

One material used in nuclear bombs is 239Pu,with a half-life of 24,000 years.How long must we wait for a buried stockpile of this substance to decay to 1/1000 of its original activity?


A) 1,200,000 years
B) 240,000 years
C) 150,000 years
D) 82,000 years
E) 1,500 years

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