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Jul 30, 2009 5:34 am tiffanynace tiffanynace
Jul 30, 2009 5:33 am tiffanynace tiffanynace
Feb 12, 2009 3:43 pm jhoeffner jhoeffner
Feb 12, 2009 3:42 pm jhoeffner jhoeffner
Feb 12, 2009 3:29 pm jhoeffner jhoeffner
Feb 12, 2009 3:26 pm jhoeffner jhoeffner
Feb 12, 2009 2:38 pm prpotter prpotter "http://phet.colorado.edu"
Feb 10, 2009 3:45 pm thoner thoner
Feb 10, 2009 3:44 pm thoner thoner
Feb 10, 2009 3:42 pm thoner thoner
Feb 10, 2009 2:30 pm pensfan pensfan
Feb 10, 2009 12:25 pm tiffanynace tiffanynace
Dec 4, 2008 3:51 pm summersoff summersoff
Nov 30, 2008 10:32 am summersoff summersoff
Nov 30, 2008 10:27 am summersoff summersoff
Nov 30, 2008 10:13 am summersoff summersoff
Oct 2, 2008 1:05 pm summersoff summersoff