Wool Cloth for Electrostatic Charging Material_Hardwood are simulated on the LCD

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

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

this polished-wood test tube rack holds six tubes up to 22 mm and supports both storage and inverted drying

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 are simulated on the LCDUsed 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.