Aepinus Capacitor Electrostatic Demonstration Apparatus Capacity_50mL Adjustable mass on one fork

Adjustable mass on one fork shifts its 440Hz pitch by a few hertz

Rod-mounted full-size skeleton pairs bare bone on one side with painted muscle origins and insertions on the other for skeletal and myology teaching

pairing a fixed 12V AC line with a continuously variable 0 to 12V DC line at 5A each

Sturdy wooden pulley simple-machine model with multiple pulleys mounted in series and parallel

Aepinus Capacitor Electrostatic Demonstration Apparatus Capacity_50mL Adjustable mass on one forkAepinus capacitor with adjustable plates demonstrates electrostatic principles, capacitance, and electric field physics in classroom experiments.