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gizmo_the_mogwai [7]
4 years ago
6

How long will it take to turn 27g of plutonium240 to 9 g

Advanced Placement (AP)
1 answer:
drek231 [11]4 years ago
4 0
The half-life of Pu-240 is 6,561 years.

Half life can be modeled by the function

f(x) = P(0.5)^x

P is our starting amount.

x is the number of half-lives required to equal f(x).

f(x) is the amount left after x half-lives.

9 = 27(0.5)^x
1/3 = 0.5^x
log(0.5)1/3 = x
x = 1.585

6.561 years * 1.585 half-lives = 10,399.185 years.
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