Understand the principles of rigid body equilibrium and torque. Learn how forces and rotations balance in physical systems.

As systems and devices become ever smaller, we're increasingly being forced to reconsider ideas we've relied on for decades. Unsurprisingly, this can be quite an undertaking — and none more so, ...

How it works: the wave in the foreground is an illustration of the phase of an out-of-equilibrium Bose-Einstein condensate in a 1D cavity, which belongs to the Kardar-Parisi-Zhang universality class.