3-Piece Pendulum Bob Set with Hooks (Brass, Copper, Iron), 25mm Hypotenuse_50mm demonstrating how AC input is

demonstrating how AC input is converted to pulsing DC output

Fullerene C60 kit with 60 atoms and 90 bonds for building the spherical cage structure characteristic of fullerene carbon allotropes

Universal 2-input NAND gate module with red/green LED outputs and a printed truth table

Adjustment screws (3 x 1 inch) on a metal base position two neodymium magnets

3-Piece Pendulum Bob Set with Hooks (Brass, Copper, Iron), 25mm Hypotenuse_50mm demonstrating how AC input isThree bob pendulum set with 1 inch brass, copper, and iron bobs, each with a removable threaded hook for mass and density comparison in pendulum period investigations.