Asked by CEO
a radioactive sample has a half-life of 4.0 min. what fraction of the simple is lefts after 20min?
Answers
Answered by
oobleck
20 min = 5 half-lives
so, you will have (1/2)^5 = 1/32 of the original amount
so, you will have (1/2)^5 = 1/32 of the original amount
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