Simple Form Wheel and Axle Apparatus Science at Home_Math Hand-cranked Van de Graaff generator

Hand-cranked Van de Graaff generator with a 9

the universal gate from which any other Boolean function can be built in digital-electronics work

this polished hardwood funnel-and-burette stand adjusts height up to 18 inches for consolidated benchtop chemistry workflows

this 80mm steel needle in a 6mm rod doubles as a precise alignment reference for image-formation and ray-tracing setups

Simple Form Wheel and Axle Apparatus Science at Home_Math Hand-cranked Van de Graaff generatorSimple form wheel and axle with a larger wheel on a smaller axle, a classic simple machine apparatus for demonstrating mechanical advantage through radius ratio.