Brownian Motion Lab

Adjust speed and mass, then watch how the heavy red particle responds to molecular collisions.

2
100

Average wall force

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Estimated force exerted on the walls by particle bounces using the current mass and speed settings.

Average collision frequency

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Estimated red-particle collisions per second from particle density and relative speed.

Estimates use a 1 nm canvas scale, 1 fg per mass unit, and a 1 ps collision window.