US$ 24.99
both AC and DC simultaneously
demonstrating mechanical-to-electrical energy conversion as the crank lights the bulb
showing the hexagonal bonding within each layer and the weak bonding between layers
Built from two counter-rotating foil-sectored plates with a belt drive and a pair of Leyden-jar condensers
Cutaway working steam engine model with piston
6-Piece Acrylic Prism and Lens Set with Wooden Storage Geology_Geology Charts & Models both AC and DC simultaneouslySix piece transparent acrylic prism and lens set with all faces polished, packaged in a wooden storage box, covering core dispersion and refraction shapes for ray box optics work.
US$ 24.99
US$ 29.99
US$ 451.11
US$ 206.66