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    Queen09's Avatar
    Queen09 Posts: 10, Reputation: 1
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    #1

    Dec 7, 2010, 05:22 AM
    dropping beta particles
    iodine-131,half life=8.0 days, initially emits 9.95 x 10^(18) beta particles per day. How long will it take for the activity to drop 6.22 x 10^(17) beta particles per day?
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
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    #2

    Dec 7, 2010, 10:11 AM

    Answered here: https://www.askmehelpdesk.com/math-s...ml#post2624520
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