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28 January, 01:49

A certain radioactive substance has a half life of one hour. if you start with 1g of the material at noon how much will be left at 3:00 PM?

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  1. 28 January, 02:00
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    There will be 0.125g (1/8th) left of that radioactive substance by 3:00pm

    12:00 = 1g

    1:00 = 0.5g

    2:00 = 0.25g

    3:00 = 0.125g
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