Day 127: Board Meeting, Slinkys, & Molar Mass

AP Physics 1: Torque Board Meeting

We had our board meeting to get to the definition of torque. As expected, in the class where I had students plot the ratio of the forces on one axis and the ratio of the radii on the other, results were rough and I had to step in. In my other section, results came out beautifully and students were quick to figure out why their graphs had intercepts. I also introduced students to Brian Frank’s area models for torque, which students seemed to grasp.

ap lever board.jpg

Physics: Slinkys

We used slinkys to start figuring out some ideas about longitudinal waves. Students were pretty successful at noticing the things I wanted them to notice. As with transverse waves, we tied some ribbons on the spring to help track the particle motion.

slinky.jpg

Chemistry Essentials: Molar Mass Lab

I got out samples of several different materials, and had students weigh a sample and figure out how many moles they had. Not the most dramatic lab, but it was some good practice.

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