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14 November, 18:17

A Nuclear reactor produces product 20kg of uranium-235. if the half life is about 70years, how long will it take to decay to 0.1kg

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  1. 14 November, 18:32
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    t = (70) ln (19.9/20) / -ln2

    70 is the years. 19.9 kg is what is left after 0.1kg decay. 20kg is your initial amount.

    t=0.506 years with a decay constant of 0.0099021/year
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