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  4. The count rate of an alpha particle source is 400 per min. If te half...

The count rate of an alpha particle source is 400 per min. If te half...

The count rate of an alpha particle source is 400 per min. If te half life of the source is 5 days, what would be the count rate per min after 15 days?
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Asked by DAMLOIS on 16th January, 2015
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