Day 130: Helmholtz Resonators

Based on a great suggestion by @wslaton, today’s lab practicum for the Oscillating Particle Model unit was to have students modify the volume (e.g., add water to) their Helmholtz Resonators (e.g., water bottles) to produce the specified frequency. The results were fantastic. Students based their calculations on this article.

I also shared a video of how Dyson uses a Helmholtz cavity to reduce the noise of their vacuum.

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Day 126: Travel to the FIRST Robotics Competition Lake Superior Regional

This morning Huskie Robotics, FIRST Team 3601, left for Duluth, Minnesota with 27 students to compete in the Lake Superior Regional of the FIRST Robotics Competition. We spend most of the day driving and then unloaded our equipment and robot into the “pits.” The robot was sealed in a bag on “stop-build day” which was February 18th. I was relieved and surprised that before we left our pit, the inspector had checked our paperwork and cleared our robot to be unbagged first thing tomorrow morning!

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Day 125: Mathematical Models for Simple Harmonic Motion

In Honors Physics, students performed an activity to connect the graphical model for simple harmonic motion to the mathematical model and to the physical apparatus. I posted about this lab in the fall when my AP Physics B class did it. This year we are “piloting” the AP Physics 1 curriculum with Honors Physics; so, the Honors Physics classes are doing some of the same labs as my AP Physics B class. It is odd to have two different classes do the same lab at two different times in the same school year. Regardless, I love this lab as it really helps students make connections among the multiple representations for simple harmonic motion.

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