Sorry, left out the link. Here is the latest spreadsheet. Try using it to find pbefore and pafter and make sure they match. Remember that the last two runs Cart B comes in with a negative v. Note that v1 and v1' are for cart A; v2 and v2' are for cart B.
Lab sheets turned in on Monday if pretty good will be worth 25 extra credit points. They will all be due by Wednesday so do give it a shot.
Have a very Happy Thanksgiving and do think about all you have to be thankful for and about physics ( although that is redundant since physics is one of things you should be thankful for, after all, try cooking a turkey without heat transfer)
http://h1.ripway.com/DrCherdack/Hon3Mom%20lab-1.xls
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