Wool Cloth for Electrostatic Charging Material_Hardwood Cross wires set inside a

Cross wires set inside a 10mm aperture on a 75mm circular black metal screen

and a 60cm multicolored scale on a hollow wooden resonance box let students vary length and tension to test the physics of vibrating strings

are simulated on the LCD monitor and provide realistic diagnostic measurement facilities

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Acrylic bell-in-vacuum jar with an internal 4-6V DC electric bell that fades and falls silent as the enclosed air is removed

Wool Cloth for Electrostatic Charging Material_Hardwood Cross wires set inside aUsed to generate triboelectric static charge by rubbing against glass, rubber, or acrylic rods, this wool cloth is a standard accessory for electroscope and Van de Graaff work.