An interactive chain-fountain (Mould effect) laboratory. One pickup coefficient reproduces both textbook falling-chain accelerations and decides whether a poured bead chain arches above the beaker rim. Independent reimplementation of the physics; original demonstration popularised by Steve Mould (2013), explained by J. S. Biggins and M. Warner, Proc. R. Soc. A 470:20130689 (2014). Not affiliated with either.

Every public app is built from a security-scanned skill and must pass a clean scan — skill and frontend — before it can be listed. Have a skill of your own? Turn it into an app — or read the step-by-step walkthrough.