Brownian motion: Like C+55+0, with an aluminum disk added.

Brownian motion: Like C+55+0, with an aluminum disk added. Projected Image of steel ball 'molecules' and 'smoke particle'. Smoke particle is battered by the steel balls. This mechanical device simulates molecular motion. It consists of steel balls that are 'kicked' by vibrating metal bars, and a larger lightweight disk representing a smoke particle. 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 variac. Variac KINETIC THEORY AND GAS MODELS.