October 11th, 2009, 02:14 PM  #1 
Newbie Joined: Oct 2009 Posts: 1 Thanks: 0  Half life
Need some help on solving this problem: If 17% of a radioactive substance decays in 5 hours, what is the half life of the substance? Thanks, 
October 11th, 2009, 02:56 PM  #2 
Senior Member Joined: Mar 2007 Posts: 428 Thanks: 0  Re: Half life
Google [half life formulas]


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