At some instant of time the activity of a sample of
At some instant of time the activity of a sample of radioactive material is 4.1 µCi. If the sample contains 1.1 × 109 radioactive nuclei, what is the half-life of the material? Answer in units of s.
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at some instant of time the activity of a sample of radioactive material is 41 microci if the sample contains 11 times
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