| WAVES AND OSCILLATIONS - OSCILLATIONS - SIMPLE HARMONIC MOTION | Order |
Gee-Haw Whimmydiddle # 3A40.901 |
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Description: One of the sticks has notches cut out of it and a propeller on the end. Rub the second stick over the notches with your finger pressed into the notched stick, and the propeller will turn one way. Then extend your finger over the notched stick and pull back so that you are now pull against the notched stick while you're rubbing it, and the propeller will turn the other way. Parts: A notched stick. A second stick. Purchased/Built: built Setup Time: none Quant. in Demo Room: 1 |
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