The search for a perpetual motion machine has been the chupacabra of physics for centuries. Multiple designs have been made, tested and, ultimately, found lacking. Perpetual motion machines are ...

A wheel weighted with swinging mallets. A cylinder rotating in a sealed, water-filled container. A siphon that transfers liquid back in forth in a seemingly endless loop. These may sound like the ...

This video captured a fascinating demonstration of physics by a parrot. The bird jumped onto a spinning wheel apparatus and ...

Let's start with a water wheel in still water with an electric generator hooked up to it. Let's say it has a ratchet wheel so it can only turn in one direction. I want to calculate the probability ...

Perpetual motion machines can do work indefinitely with zero energy input. Unfortunately, they don't exist. Perpetual motion machines can do work indefinitely with zero energy input. If one existed, ...