- #1
cragar
- 2,552
- 3
I was reading about the sprengel pump , And it uses falling mercury to trap air to evacuate a chamber to get the air out of it , http://en.wikipedia.org/wiki/Sprengel_pump you can look at the diagram of the pump , my question is when the mercury traps the air and pushes it down , why doesn't the air just rise back to the top like air bubbles coming out of a divers mask back to the surface of the ocean.