(20 13? Two thin-walled light cylindrical containers, A and B, on the horizontal desktop of Shenyang No.2 Mould are filled with water of the same mass, as shown in the figure. Water is harmful to A an

(20 13? Two thin-walled light cylindrical containers, A and B, on the horizontal desktop of Shenyang No.2 Mould are filled with water of the same mass, as shown in the figure. Water is harmful to A and B. According to the gravity formula G=mg, the mass of water in the two containers is equal, so the gravity is equal; Because A and B are both cylindrical containers, the pressure of water on the bottom of the container is equal to the gravity of water, that is, F A =F B 。

According to the pressure formula p=ρgh, because both containers are filled with water, the density is the same; ρ is constant; So the size depends on the height h of water, and the higher the height, the greater the pressure, as shown in the figure, H A > H B, so P A > P B.

If two identical wooden balls are put into container A and container B respectively and stand still, the liquid level in container A changes greatly. From p=ρg△h, it can be known that △ P A > △ P B. 。

So the answer is: =; >; >.