Explain the physics

Heron's fountain, invented by Heron of Alexandria in the 1st century AD, is a hydraulic device that uses air pressure and gravity to create a temporary water flow. It consists of interconnected containers where water and air interact to push water up through a spout, creating a fountain effect. Though it may run for several minutes, depending on the nozzle size, it eventually stops. It's not a perpetual motion machine, as it relies on a finite water supply and the gravitational energy difference There are various variations in it..

Unequal pressure The water level at the source of the siphon must be higher than the water level at the end of the siphon. This creates unequal pressures on the water, with higher pressure at the source and lower pressure at the end. Water will flow from the higher pressure to the lower pressure. Atmospheric pressure As liquid is sucked through the siphon tube, the atmospheric pressure at the highest point in the tube decreases. This causes the atmospheric pressure on the liquid's surface to push the liquid up the tube towards the lower pressure area. Bernoulli's principle This principle states that the faster a liquid flows, the less pressure there is within the flow. Siphons are thought to work in accordance with this principle.

Why can’t this system be used to generate all the energy we need.

It’s called water pressure

Future restaurants.

Simple pressure

It's a Heron's fountain. That could work a few seconds only. Unfortunately, perpetual motion does not exist and will never exist.

Steve Mould would explain better than anyone.....

Air pressure is key