Physics 9-4-13 Free Fall, Pt. 2 and Reaction Times

PHYSICS – Here’s a question – how could this kid figure out how tall this cliff is? Good job on finding the height of the balcony – were you within 10% error? Wonder why???

From Wednesday, here’s the work we did on #32, the “ball dropped from the top of a building and thrown up from the ground at the same time” problem. The problems tonight will be a little challenging, but after today’s hints, no problem!!

Draw a picture, write down what you know and are looking for. What formula fits? On the problems with something going up and then dropping something else, like the pelican or the parachute, don’t forget that the item dropped has the velocity of the first thing. And to find how far apart they are, you usually have to figure in that the first thing was still moving when the second thing was dropped. Make sense? And be careful to keep positive and negative straight! Good luck – you’re doing a great job with these. I’m really proud of you!!

Physics 9-4-13 Free Fall, Pt. 2 from Tammy Skinner on Vimeo.

flickr photo by

Hon Chemistry 9-4-13 Relationships Between Data

HON CHEMISTRY – Hey guys, here’s lecture from Wednesday on direct and inverse proportions. Just brief info for the test for now, and we’ll put it to practice in a couple of activities after the test. I have not yet posted the graphing activity – I’ll let you know when I do.

By the way, speaking of tests, how’re you doing on these last problems? Are you able to pull together all we’ve done in this chapter? Help session?

HON CHEMISTRY 9-4-13 Relationships Between Data from Tammy Skinner on Vimeo.

Image source…/s320/puzzle.jpg

Chemistry 9-4-13 SI Conversions, Pt. 2

CHEMISTRY – Great job moving ahead with conversion factor problems on Wednesday! Thursday night you’ll have some harder problems – don’t up, you can do it! Remember what you learned about finding the quantity given by removing all the conversion factors.

Need extra help or practice? Help session Friday morning, 7:15 A.M.

CHEMISTRY 9-4-13 Conversion Factors, Pt. 2 from Tammy Skinner on Vimeo.

flickr photo by D Sharon Pruitt, Pink Sherbet Photography