Physics 12-3-13 Simple Machines

PHYSICS: Wow! Do you realize what we just did? We finished the chapter! Well, we’ll add this small lecture on simple machines from chapter 7 to the chapter 5 test – but we’re done! Did you remember this stuff on simple machines from your physical science days?

I don’t think you’ll have any trouble with efficiency and mechanical advantage problems. How do you think the efficiencies of machines compare? Could you design a method to test that? You don’t need no stinkin’ lab sheets! Do you?
🙂

PHYSICS 12-3-13 Simple Machines from Tammy Skinner on Vimeo.

flickr photo by André Banyai

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CHEMISTRY 12-3-13 Structure of the Atom, Pt. 1

CHEMISTRY – Chocolate chip cookie dough model of the atom? Here’s the lecture from Tuesday on how scientists began to determine the structure of the atom and the existence of subatomic particles – well, the electron anyway. FYI – as we go on, make sure you know the name of the scientists, the name of their experiments, be able to draw a diagram of their experiment, and describe how they interpreted the experimental results that led to their discoveries. Wow, that’s a mouthful!

Click here for the video on the Cathode Ray Tube Experiment that Thompson did, and also for the video clips that I want you to watch on The Discovery of the Electron and The Discovery of the Nucleus. All of these will be great tools in studying for the test!

Change in plans! We’ll finish notes tomorrow and move the Model of the Atom activity to next Tuesday, the day after the test. Help session? What about Friday?

CHEMISTRY 12-3-13 Structure of the Atom, Pt. 1 from Tammy Skinner on Vimeo.

flickr photo by pixxiestails

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