Thought experiment about pressure (intro physics) ..you have a U-shaped tube? that is open to the atmos on both the left and right side you fill it with water so the water level is the same on both sides. then you put a rubber stopper in one end (..the right end) (also the remaining air between stopper and water surface was somehow sucked out after you put the stopper in) next you somehow suck out some of the water from left side, so now the levels on each side are uneven. (right side remains right up to the stopper, and left side is halfway down) So... the pressure at the surface of the left side is 1atm right? But what is the pressure at the SAME LEVEL on the right side? If it is also 1atm please explain why, because its totally confusing me. thanks alot!!!!!!!!