the image above shows an inverted U-tube with the open end, O of one limb below the level, W of water in the tank, in order that water should begin to flow from the tank it is is necessary that
A. The U-tube is completely filled with water and that P should be higher that W B. P should be lower than O and W C. P should be lower than W and O should reach the botton of the table D. The U-tube is completely filled with water and that P should be lower that W
