Mechanical model of a gas: Vibrating balls on OHP.

Mechanical model of a gas: Vibrating balls on OHP. This mechanical device simulates molecular motion. It consists of steel balls that are 'kicked' by vibrating metal bars. The device is designed to sit on an overhead projector and project an image of the moving balls on a screen. The intensity of the vibration of the balls is controlled by the power supply. Note: A variable power supply (Variac) or a fixed power supply (48 VAC, 5 Amps) are available. KINETIC THEORY AND GAS MODELS.