Multiple Choice
The material used in nuclear bombs is 239Pu,with a half-life of about 20,000 years.How long must we wait for a buried stockpile of this substance to decay to 4% of its original 239Pu mass?
A) 93 thousand years
B) 64 thousand years
C) 45 thousand years
D) 0.80000001 thousand years
Correct Answer:
Verified
Correct Answer:
Verified
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