Double Long Pulley, 2" and 1.5" Wheels Material_Acrylic Lamp-house assembly dimensioned as the

Lamp-house assembly dimensioned as the matched replacement unit for optical bench and light-source apparatus when the original housing reaches end of life

showing mechanical advantage through fluid pressure transmission

Set of eight steel tuning forks tuned to scientific pitch (C4 = 256 Hz) for classroom work on sound waves

Copper 1-inch diameter pendulum bob at 2

Glass tubing 6 mm bore

Double Long Pulley, 2" and 1.5" Wheels Material_Acrylic Lamp-house assembly dimensioned as theUnequal wheel pulley with a 2 inch and a 1. 5 inch wheel at 5. 75 inches overall in a metal frame with end hooks, showing how different wheel diameters change mechanical advantage.