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90% of a radioactive sample is left undisintegrated after time I has elapsed, what percentage of initial sample will decay in a total time 2t: |
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Answer» 0.38 If decay fraction is f in time `TAU`, it will be `f^(2)` in time `2TAU`. Material decays to `9/10` in time `tau`. In time `2tau`, it will decay to `f^(2)` `=(81)/(100)` of ORIGINAL fraction remaining =19% |
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