Twenty-four perfectly elastic balls in a sealed box. There is no temperature setting here, because temperature is not a thing you set -- it is the average kinetic energy of these bodies, on the energy chart. Pressure is the balls hitting the walls. Nothing damps them, so the total energy line stays flat, and the speeds shuffle into a spread through collisions alone: thermodynamics as mechanics, with the statistics left to emerge.
Drag objects to interact · scroll to zoom · simulated live on a real physics engine
