Daily Archives: September 30, 2015

Physics 9-30-15 Relative Motion, Jumping on Mars, and Kid on a Slide with a Water Gun

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PHYSICS – Wow, we finally made it to the end of chapter 3! Do you realize how much you’ve accomplished? Let’s take it all tomorrow and put it to practice!

How’d you do with relative motion “revisited”? You know, you’ve done this already. The only new part is the motion of objects in the same direction and opposite directions, relative to each other. Don’t forget, you’ll use what you learned about vector addition to work those “boat goes across a river” and “plane experiences a head wind” types of problems.

Here are the answers to tonight’s problems. You can do them!!! (Helps session?)

36) 4.11 m
37) 80 m; 210 m
43a) 10.1 m/s at 8.53° east of north; b) 48.8 m
44a) 14.1° north of west; b) 199 km/h
45) 7.5 min
46a) 23.2° upstream from straight across; b) 8.72 m/s across the river

Physics 9-30 Relative Motion, Jumping on Mars, and Kid on a Slide with a Water Gun from Tammy Skinner on Vimeo.

flickr photo by Richard Yuan

Chemistry 9-30-15 Law of Conservation of Mass Lab

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CHEMISTRY – Great job on the lab this week! So did you “see” the Law of Conservation of Mass the first time you did it? The second time? What was the difference?

Be sure and tell me about that in your conclusions. Also, give me details in your procedure. What did you do differently in the second lab and why do you think it worked?

Any other questions about writing the lab report? Be sure and include lab photos in your observations. And carefully follow the Conservation of Mass Lab Report information sheet.

The lab report is due by Thursday midnight. Save it as a PDF to your Google Drive shared folder AND turnitin.com. I’m thinking it also might be a good idea to review the Digital Lab Report manuscript form AND – did I mention, remember you must also follow the Conservation of Mass Lab Report Notes that are here on the website (lab tab above).


flickr photo by Ken Schwartz