Demonstration Compass Science at Home Double-concave glass lens at 3-inch

Double-concave glass lens at 3-inch diameter and 200mm diverging focal length

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

the standard configuration for keeping the field intact between classroom magnetism sessions

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

paired with 4mm sockets so iron-filing patterns can be mapped around a current-carrying conductor for Oersted's experiment

Demonstration Compass Science at Home Double-concave glass lens at 3-inchFive 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.