Daily Archives: August 24, 2012

Hon Chemistry 8-24-12 Derived Units

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HONORS CHEMISTRY – Hey guys, here’s a pic of high density koi that I saw in Hawaii (at the Dole Pineapple Plantation, of all places!).

So do you feel comfortable with the derived units/formulas that we discussed? Here’s the lecture from Friday. Be sure and practice the density problems and let me know Monday how you’re doing with them.

On a more practical side, how is your balance coming? Have you figured out how density plays a major part in how it works? Here are the actual masses. Are your answers close to these? If not, what could be some reasons? Make sure you include that in your conclusion. Holler if you have any questions! 🙂

• Penny: 3.1 g before 1982, 2.5 g after
• Nickel: 4.95 g
• Dime: 2.25 g
• New state quarter: 5.68 g

Physics 8-24-12 Velocity Problem, #11

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PHYSICS: Hey guys, here’s the work we did on # 11 from last night’s homework. So can you work it by yourself now? Don’t just copy your notes! Also, don’t forget to give the problems on the syllabus a fighting chance. (Jeremy – the old varsity try?? Is that it? Still doesn’t sound exactly right.) Come on, you can do it – and let’s crank it up a notch Monday!

UPDATE: Since we had to use the distances from the flag as distances, not displacements, you’ll need to use speed or velocity? What do you think? Makes a huge difference!
🙂

I almost forgot! Here is the extra problem that I was telling Wil about today in class. Not exactly like number 11, but it kind of uses the same type of thought processes. Two students walk in the same direction along a straight path, at a constant speed – one at 0.90 m/s and the other at 1.90 m/s. How far would the students have to walk so that the faster student arrives 5.50 min before the slower student? (answer……………………570 m)


flickr photo by darkmatter

Chemistry 8-24-12 SI Measurements

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CHEMISTRY – Hey guys, so is all the info on SI measurements starting to come back to you? Here’s the lecture from Friday. I’m sure it’s mostly review from your physical science days, but it’s a great opportunity to refresh what you’ve learned and to get ready to begin using it! We’ll do derived units Monday.

Any questions about the take home labs? Post a comment here and I’ll try to help. And have a great weekend!!


flickr photo by Nils Geylen