EvilSOB, ventilator: Why would the ball ever enter the leftside medium? (Be it alcohol+water, water+air, or any other two substances)
Even with perfect Valves, I don't think it would enter a medium from the bottom if that medium is denser than the one one it's in.

yes, this already did come up. the only solution to make this thing work would be a very energy efficient teleporter.

what about doing it on a smaller scale and using osmosis or something? but there would be the same problem. it would only work in one direction.

http://www.tga-fachplaner.de/Funktions-Prinzip-eines-Osmose-Kraftwerks,QUlEPTI2NDY0NCZNSUQ9MzAwMDI.html

Summing up, in my opinion, each materia will end its life in a black hole, therefore perpetual motion is not possible, but one thing will exist very long (maybe infinitively) as there exist a black hole, simply gravitation.
Therefore gravitation is itself ala perpetual mobile imho.

Anyway, to build an experimental PM will be costly to.
What would you say about a little contest for the best PM with physX engine?

MY 'belief' with the ball entering the left-side media is based on the length of the vertical pipes...

Once the pipe is long enough, the ball will pick up enough momentum during its 'fall' to push it across
the boundary between light and dense media.
Whenever there are two media face-to-face (as at the boundary) there will be an equivalent of 'surface tension'.
The greater the difference in density, the greater the tension.
So if our two media are close to the same density, then the tension the ball needs to break is less, so the slower
it can be moving.
BUT THEN the density of the ball needs to be more accurately calculated in order to sink on the right side but float on the left.

Remember, it has been a LONG time since scool for me, so this is all based on rusty theory...

game physics engines wouldn't be good to simulate something like this. they gain or lose energy quite quickly because of float imprecision.

@EvilSOB I meant just for fun and not the scientific method.


Yes, with the same inaccuracies everyone had the same float imprecision, because everyone will have the same results and only one physx engine will be used.

Would anyone like to take a part in this contest ala Perpetuum mobile with PhysX engine?
Of course, if I find much willing users to the contest, then I give the rules of that contest in a new thread.

Consider a square section and a cube , instead of a sphere , just to make it easier

The work made by the fluid is:

W = P * A * L

With P = density of the fluid * H

W = density of the fluid * V * H

The potential energy of the cube is :

U = density of the cube * V * H

If U > W Then density of the cube > density of the fluid

If the cube enters the pipe the fluid can not lift the cube

I think he didn't mean enough momentum to push the cube all the way up the fluid.

Edit: what could be possible, though, is a suprafluid substance such as He4. I just don't see how you would keep it on the left side.