Drag this box around to push air molecules out of the way to
create a vacuum. You can make a vacuum region, but it won't last long. Why?
An interactive physics simulation of Brownian Motion (with option to ignore collisions from air particles pushing down).
Brownian Motion is the random motion of particles that are suspended in a gas or a liquid. Drag the first slider to see what's going on behind the scenes and play around with the physical parameters. You can also download a snapshot if your particles draw you something inspiring.
This demo was plagiarized from a demo showing full Brownian Motion at http://labs.minutelabs.io/Brownian-Motion/
To understand this demo, read the blog post: Half-Brownian Theory of Flight.