# Hon Chemistry 10-4-11 Formulas with Polyatomic Ions & Binary Molecular Formulas

HON CHEMISTRY: Are you starting to see numbers in your sleep? Here’s the lecture from Monday on writing chemical formulas with polyatomic ions, and also an intro to binary molecular formulas. The same, but different……huh? Tons of memorization for this chapter – monatomic ions, polyatomic ions, prefixes, and this is just the beginning. Good luck, and keep practicing!!!

flickr photo by designwallah

# Physics Test on Chapter 3, 2-D Motion

PHYSICS: So you ready for that test tomorrow? Since the help session isn’t until tomorrow morning, I thought I’d go ahead and post a couple of old reviews on the homework and worksheet problems (2 different vodcasts from last year). Don’t forget what you should do to start – Draw a picture, write what you know, resolve the resultant velocity into vertical and horizontal if you need to, and find formulas that fit (because it will hardly ever be solved with just one) and go for it!!

If you are talking angular projectiles, the resultant velocity is actually made up of two things – horizontal velocity and vertical velocity. The horizontal velocity never changes, the vertical velocity has a different direction going up and coming down, but it has the same speed at equal levels. If you’re talking horizontal projectiles, the resultant velocity is the same as the horizontal velocity of the gun, because that’s the only kind of initial velocity it has! Relative motion is even easier – just use the Pythagorean theorem and tangent, and use horizontal to find horizontal and vertical to find vertical. Good luck!!

flickr photo by Felipe Skroski

flickr photo by f-l-e-x

# Physics Help Session Wednesday Morning, 7:15 A.M.

And I promise not to start with the really hard problems this time! How’re the problems going? You can do this!! If you are talking angular projectiles, the resultant velocity is actually made up of two things – horizontal velocity and vertical velocity. The horizontal velocity never changes, the vertical velocity has a different direction going up and coming down, but it has the same speed at equal levels. Now, if you’re talking horizontal projectiles, the resultant velocity is the same as the horizontal velocity of the gun, because that’s the only kind of initial velocity it has!

Draw a picture, write what you know, resolve the resultant velocity into vertical and horizontal, find formulas that fit (because it will hardly ever be solved with just one) and go for it!! Capisce? ðŸ™‚ Oh, by the way – don’t forget the conceptual stuff!

# Chemistry 10-4-11 Chapter 1 Test

CHEMISTRY – Finally! The end to chapter 1. Here’s the rest of energy (kinetic and potential) and then the test review Good luck studying! Make sure you aren’t just reading your book and notes. First, memorize the facts, then go back and make sure you can apply the concepts. Study examples, make your own examples, practice making questions. And don’t forget, if you are getting lost with everything you need to know, or if you’re not sure how to study, click here for the Chap 1 Study Suggestions. You can do this – I believe in you! I’m praying for you!!

# Chemistry 10-3-11 Pure Substances & Element Handbook Search

CHEMISTRY – Well, we did it! We finally finished chapter 1, well except for energy. Here’s the last of the notes on pure substances and also the review of the Element Handbook Search 1 and 2 that you did. You can ABSOLUTELY count on that information being on the test!

Hey, have you had a chance to check out the Chap 1 Study Suggestions sheet? Symbols test tomorrow (very short) and then the main test on Wednesday! (BTW – click on the name to open the Chap 1 Study Suggestions sheet.

Image source copper-etf.org