3-Piece Pendulum Bob Set with Hooks (Brass, Copper, Iron), 25mm Hypotenuse_50mm Adjustment screws (3 x 1

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

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

demonstrating how AC input is converted to pulsing DC output

used to map how charge density concentrates at points of higher surface curvature

Nylon ball-bearing adjustable clamp pulley supporting low-friction rotation across varied rod-and-stand mounts

3-Piece Pendulum Bob Set with Hooks (Brass, Copper, Iron), 25mm Hypotenuse_50mm Adjustment screws (3 x 1Three 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.