CHEMISTRY – So, how big a bucket do you think we’d need for a mole of candy corn? Yum! 🙂 Here’s the short review we did on the mole, mass, atoms problems. Did it help? Just don’t forget the conversion factor, and think through the problems. Put units first and then numbers. Make sure what you’re doing has a reason and makes sense!
PHYSICS: Who knew snow skiing could be so complicated! Well friction problems on an incline anyway. Here’s the lecture/problem review from Monday on friction problems on an incline. Remember, drawing the diagram is super, super important. Label all the forces, and apply the concepts you know about net forces and resultant forces. And practice!!
flickr photo by t i g
Did you get the word about the help session Monday morning? It will mainly for Honors Chemistry, (test Tuesday!), but we’ll also be doing chemical formulas and names, if anyone in regular chemistry wants to come also. I’ll be there Monday morning around 7:15ish…. or probably closer to 7:20ish since it’ll be Monday morning! 🙂
Have you had a chance to look at the Chapter 7 “Stuff to Know” sheet? Here’s an UPDATED copy with the stuff we added from other chapters. WOW! You’ve learned a lot since we’ve started this chapter – and remember, the test will have some of chapter 3 and also polymers.
CHEMISTRY: So… how big a bucket do you think we’d need to hold a mole of frogs? 🙂 Nope, not the furry brown creature that burrows underground, it’s a whole different thing! Here’s the lecture from Friday on moles, mass, and Avogadro’s number. I still say he has a cool name…
PHYSICS: So why don’t things that are moving just keep moving? Here’s the intro lecture on friction. Remember a few key things. Net forces produce acceleration. You can find Ff a couple of different ways – it’ll be part of a net force equation and can be found from the coefficient of friction equation. If and ONLY if your object is moving at a constant velocity, Ff will equal Fa. Fn is only sometimes equal to Fw. If your object is pulled at any angle (or pushed), Fn will be a part of Fnet in the vertical direction. Is that enough for now? Have a great weekend!!
BTW – Did you figure out Zorba? The solution is at the beginning of this vodcast.
HON CHEMISTRY: Well, we finally finished the chapter! Did you realize molecules could be that large? And so many of them. But don’t you think polymers are cool? Here’s the lecture from Friday. Some items for contemplation: why are certain plastics recyclable and others not…and what about dishwasher and microwave safe?
BTW – Here’s a copy of the Polymer Worksheetif you need it. And the rest of the homework for this weekend is to answer the Standardized Test Prep at the end of chapter 7. Test Tuesday! 🙂
CHEMISTRY: Do you feel like we been playing hopscotch with the charges and oxidation numbers of atoms? Here’s the extra practice we did on Thursday. You’re doing a great job with them – keep practicing and make sure you MEMORIZE the oxidation rules! This vodcast will be great review for the test!
CHEMISTRY: One man’s rust is another student’s lesson in chemistry! From Wednesday – here’s the lecture on oxidation numbers. Lots of good practice at the end on this one. Need help? Don’t forget the practice at sciencegeek.net. Go to sciencegeek.net
Good luck studying for the Chemical Formulas & Memorization quiz tomorrow! You need to know: polyatomic ions, monatomic ions (but you can get these off the periodic table), acids, and the chemical names and formulas of common substances. That’s a lot!
PHYSICS: So an object at rest can be at equilibrium, but what about an object that is moving? And how does equilibrium relate to Newton’s first law? Or Newton’s second law? And what if you don’t have balanced forces. Here’s the lecture from Wednesday on just that! Now remind me, net forces produce what?