Physics 11-15-11 Intro to Work

PHYSICS: Funny thing about words, all this work you thought you’d been doing, was it? Work, I mean? Great intro to chapter 5! Jakin, I think you almost did move the lab station! πŸ™‚ And I think you’ll all do great with the work problems, just remember everything from the last chapter and multiply by d!

BTW – Did you figure out what to do with the conveyer belt problem from the end of class? Why were you supposed to subtract?

Chemistry 11-15-11 Empirical Formulas

CHEMISTRY: So, would you like to be Greg on CSI? Great start on empirical formulas today. The hardest part is that it’s not a set formula for you to plug and play, but if you’ll keep in mind that you’re really just looking for subscripts which are just moles, you’ll be able to think it through. Percent to mass, mass to moles, moles to smallest whole number ratio. And don’t forget the little step you might have to add to the end. Tomorrow – molecular formulas! πŸ™‚


Image source www.dnr.mo.gov/env/esp/images/prettytesttubes.jpg