Can a buoyant object achieve perpetual motion?

[bluegold]

Would a buoyant object be able to achieve perpetual motion or even past perpetual motion if it were in a machine as portrayed below?https://mail.google.com/mail/?ui=2&ik=93e42fc0d8&view=att&th=12ca0732e35fe2f9&attid=0.1&disp=inline&realattid=f_gh5sgy4n0&zw

 

[K^2]

You can't post images from attachment like this.

But regardless, no. There is no such thing as perpetual motion. Usually, the attempts involving buoyancy ignore the fact that it takes energy to pump air under water. Since I can't see that image, I can't tell you if that's what it is, but that'd be my blind guess.

 

[Vanadium 50]

And since we do not discuss perpetual motion machines here, this is a good spot to finish this thread.