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April 19, 2014

April 19, 2014

Posted by **amy** on Thursday, February 3, 2011 at 1:58pm.

Unfortunately the Co-60 is contaminated with Cs-137 (30.0 year half life). The

initial Co-60 activity is 400 times the initial Cs-137 activity. How long after the

initial assay will the Cs-137 activity be 0.2 times the Co-60 activity?

- Nuclear Physics -
**Professor Waller**, Thursday, February 3, 2011 at 8:06pmStop using these discussion boards for your assignments..or I will find out who you are.

- Nuclear Physics -
**terry**, Saturday, February 5, 2011 at 9:09pmOh noes

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