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A radioactive sample has a half life of 40 seconds When its activity is measured...

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A radioactive sample has a half life of 40 seconds When its activity is measured 80 secon after the begining it is found to be 6 932 x 10 8 dps During this time total energy released 6x 10 joule n2 0 6932 A The initial number of atoms in the sample is 1 6 10 B The initial number of atoms in the sample is 1 6 1021 C Energy released per fission is 5 x 10 13 J D Energy released per fission is 558 10 3 J

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