(2006? As shown in the figure, the second model in Songjiang District has a cylindrical water tank with a height of 5m and a volume of 50m3. The bottom of the water tank is connected with the water pi

(2006? As shown in the figure, the second model in Songjiang District has a cylindrical water tank with a height of 5m and a volume of 50m3. The bottom of the water tank is connected with the water pipe A and the top is connected with the water pipe B.. First, the water tank The work done on water in the two cases is different, because the work done by the outside increases the center of gravity of the whole box of water by 2.5 m, because the water is injected through pipe A; With the B-tube water injection, because every part of water is injected from the top of the water tank through the B-tube, the work done for the whole tank of water is equivalent to raising the center of gravity of water by 5 meters.

So WA=ρgV? deuterium

WB=ρgV？ H

So wawb = 12

So the answer is: 1: 2.