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A radioactive element decays by emission A detector records n beta particles in first 2...

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A radioactive element decays by emission A detector records n beta particles in first 2 seconds and 0 8 n beta particles in next 2 seconds Find the time in which 40 of the initially present nuclei will decay A 2 n 5 4 In 5 3 B 2 n 5 3 In 5 4 C 2 n 5 3 In 5 2 2 n 5 2 D In 5 3

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