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    The half-life of a radioactive nuclide is 8.0 s . The initial activity of a pure sample of the nuclide is 10000 Bq . What is the approximate activity of the sample after $4.0 \mathrm{s} ?$

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    HLPaper 1A

    The half-life of a radioactive nuclide is 8.0 s . The initial activity of a pure sample of the nuclide is 10000 Bq . What is the approximate activity of the sample after 4.0s?4.0 \mathrm{s} ?4.0s?

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