Daily Archives: August 28, 2015

Physics 8-28-15 Velocity Problems

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PHYSICS – Here are the velocity problems from Friday. You did a great job on these! Do you see what I mean about learning to think through them? Do you think you can tackle #11 now?

Stay strong on those next five problems! Make sure to do more than just show the math – be sure that I can also follow your logic in the formulas. Ditto with units, etc.

Don’t give up on the tortoise and the hare. A couple of hints: remember the problems we did in class today – it’s kind of like those. The distance the tortoise travels is the same as the distance the hare travels plus the extra 20 cm he was ahead. Also, the time the hare raced is equal to the time of the tortoise minus those two minutes he rested.

We’ll work through them in class if you need some help, but FIRST, make sure you have already worked them yourself – even if you think your work is wrong!

Now go have fun! And have a great weekend!! 🙂

Physics 8-28-15 Velocity Problems from Tammy Skinner on Vimeo.

flickr photo by darkmatter

Chemistry 8-28-15 Accuracy and Precision & Intro to Significant Figures

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CHEMISTRY – So which is more important, accuracy or precision? Great discussion on causes of error in the lab and how to prevent them!

So you’ve been using been using significant figures all along when you were measuring in the lab! Now the other half – using them in calculations will be no big deal at all!

Speaking of this weekend – how’s the thLab going? Be sure and read the post below this one on . Be sure and give yourself plenty of time!!

And in the middle of all of this lab stuff – don’t forget to be studying for the SI quiz!!

Chemistry 8-28-15 Accuracy and Precision & Intro to Significant Figures from Tammy Skinner on Vimeo.

flickr photo by jambe

thLAB: Building Your Balance

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CHEMISTRY: Pretty cool, huh?!? Do you understand now how a balance works?

A couple of IMPORTANT things about doing and writing up thLABs:

  • Yes – you ALWAYS do all the questions on labs.
  • Always to the extension on thLABs if there is one, but if you are not sure, ASK!
  • The actual masses of the coins can be found on the Internet. Google it!!
  • Yes, you find your percent error on each coin – make sure you show your work with formula and units!!
  • Be sure and give yourself plenty of time to upload to the Google Drive Assignment Turn-In folder and Turnitin.com!
  • The info for setting up your turnitin.com account is on the first day Tech Overview sheet – it’s under the worksheet tab. That sheet will give you the password and show you where to find the other instruction.

Holler if you have any other questions. Have fun with your lab!!
Balance 2
Image source: Alex Dean