Demonstration Compass Science at Home Hand-crank centrifuge spins four 15mL

Hand-crank centrifuge spins four 15mL tubes for teaching sedimentation

the moderate curvature spreading light gently for divergence and virtual-image-formation work in refraction demos

An 18mm pole gap on this 37 x 13 x 10mm Alnico U-shape concentrates field strongly enough to bend filings into clear field lines

producing more sinusoidal oscillation than a standard helical spring for SHM studies

letting students plot resonance against length and back-calculate the speed of sound

Demonstration Compass Science at Home Hand-crank centrifuge spins four 15mLFive inch demonstration compass with a 4 inch magnetic needle and a printed compass map, sized so the needle stays readable from the back of the room.