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Demonstrate harmonic motion while creating beautiful drawings with this device designed by science teacher Bruce Yeany. Ideal for demonstrating torque and simple harmonics.
Using colored pens, potential energy and the table, you can create patterned drawings called harmonographs. No two harmonographs are ever identical!
Includes: background information, detailed instructions. You supply only the paper and 4 kg of weights. Grades 7-12.
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