A sample of radioactive material A

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A sample of radioactive material A, that has an activity of 10mCi(lCi=3.7×10^10 decays/s), has twice the number of nuclei as another sample of a different radioactive maternal B which has an activity of 20 mCi. The correct choices for hall-lives of A and B would then be respectively :
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Nov
A sample of radioactive material A, that has an activity of 10mCi(lCi=3.7×10^10 decays/s), has twice the number of nuclei as another sample of a different radioactive maternal B which has an activity of 20 mCi. The correct choices for hall-lives of A and B would then be respectively : A sample of radioactive material A [...]
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Tags: A sample of radioactive material A , has twice the number of nuclei as another sample of a different radioactive maternal B which has an activity of 20 mCi. The correct choices for hall-lives of A and B would then be respectively : , that has an activity of 10mCi(lCi=3.7×10^10 decays/s) ,