Physics 12-6-21 Ch 5 Review WS #19

PHYSICS: Great job with the power lab today. All I’ve got to say is how in the world?!? You’re also doing a great job with these problems! Here’s our look at #19 from the Chapter 5 Worksheet 2. Would have been helpful, I think, if I had remembered that they didn’t tell you it was at constant velocity.

God bless you as you continue to prepare for the test! I’m praying for you!!!

Photo by Joanna Kosinska on Unsplash

Hon Chemistry 12-3-21 Describing Chemical Reactions

HON CHEMISTRY: So tell me again – how do you know if a chemical reaction has occurred? And how could you record that for someone? Here’s the lecture from Friday on writing balanced chemical equations.

Here’s another hint – not necessarily a good idea to try to make your own blue flame thrower! Click here to watch the Periodic Videos Blue Flame Thrower Video

Photo credit: Periodic Videos Blue Flame Thrower Video

Physics 12-3-21 Power & the Horsepower Lab

PHYSICS: So how many horsepower do you have? Hmmmm…..

Here’s the super short lecture from today on power – beginning with #46 from last night’s homework, and then a quick look at the power lab. Now go forth and conquer the power problems!

Need answers? Here are the Chapter 5 Review Worksheet 2 Answers:
3.) 1090 J
4.) 1350 J
5.) 79%
6.) 917 W
8.) 9.57 kW
12.) 420 N
14.) 1300 J
18a.) -125 N
18b.) -2190 J
18c.) 0.360
19.) 4380 J

flickr photo by Thomas Hawk

Chemistry 12-3-21 Using Chemical Formulas

CHEMISTRY: So the little mole turns out to be a pretty big deal – and a very handy tool!!

Awesome job today! We had a mic crash, so the vodcast posted here is from another class. Here’s discussion on formula mass and molar mass, and then using molar mass and Avogadro’s number as a conversion factor. You’ve got a couple of great tools – so now think through the problems and go forth and conquer!! Be sure and practice them so you don’t forget!

Photo by ahmad kanbar on Unsplash

Chemistry 12-2-21 Moles, Mass, Atoms & Avogadro

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 our discussion from Thursday on moles, mass, and Avogadro’s number. I still say he has a cool name… 🙂

flickr photo by Thomas Hawk

Hon Chemistry 12-1-21 Chapter 7 Test Overview

HONORS CHEMISTRY: God bless you as you study for the test! Here’s our overview of the test from today. By the way, in case you didn’t hear it, the answer to that last review problem was 2.798 x 10^23 formula units.

Have you been using the “Chapter 7 Stuff to Know & Know How to Do” sheet? It’s a great way to get organized in studying for the test. I know it seems like a lot, but you can do it!

First priority – make sure that you have memorized EVERYTHING. Then, go to The Physics Classroom and/or and make sure you can write and name chemical formulas. Practice, practice, practice!!! Then start practicing the different kinds of problems – do at least three of each one of them. And also try those on That’s always some good practice. God bless – I’ll be praying for you!

Photo by Alexandre Chambon on Unsplash