Answer to Question #21340 in Mechanics | Relativity for jake
"You have two containers, one filled with water the other empty. You connect a tube to the bottoms of the containers. What happens to the water?
This is the rule of connectedcontainers. Provided that the containers are the same, the level of water in each will set at a half of the original full level. This happens in order to equalize the hydrostatic pressure of the liquid.