2004 P2 Q10(a)
Posted 16 May 2006 - 08:41 PM
Posted 16 May 2006 - 09:26 PM
I am assuming this is the paper II question.
My solution is attached, hope this helps.
Posted 16 May 2006 - 09:28 PM
hi i am having some problems with getting the answer, could somebody please show me how to this question, cheers. I got part (b) fine it was just part (a) that caused the problems.
It's after 1000 years, so t=1000, so:
600 micrograms are left when t=1000, so:
Edit - Too slow
Posted 16 May 2006 - 09:30 PM
Posted 17 May 2006 - 08:29 AM
Part (a) tells us that when , we have . We want to know . Plugging this into the equation gives:
I hope this helps
cheers for that, i got that then for some reason i tried to get rid of the 600, then i confused myself. It was a lot easier than i thought at first!
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