Posted by
**sue moore** on
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cobalt-60 has a half-life of 5.26 years, how much of a 500 gram sample will be left after 21 years

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March 29, 2017
Posted by
**sue moore** on
.

cobalt-60 has a half-life of 5.26 years, how much of a 500 gram sample will be left after 21 years

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