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1.大气压压液面支持液柱大气与液体一样,由于受重力作用,对浸在它里面的物体向各个方向都有压强,并且都具有流动性.当大气压支持如图1所示的液柱时,如果在液面 A 处,大气对液面和液体对大气的压强只要有一点点不相等或不均匀,液体就会流出来.所以用图1方法,管的口径较大情况下是很难直接支持液柱的.大气压在水槽如图2的 B 液面上,再通过液体压在 A 液面上来支持液柱,如果管外液体
1. Atmospheric pressure liquid surface support Liquid column The atmosphere is the same as liquid. Due to gravity, the object immersed in it has pressure in all directions and has fluidity. When atmospheric pressure supports the liquid column shown in Figure 1. At liquid level A, if the atmospheric pressure on the liquid surface and the liquid to the atmosphere is only slightly unequal or non-uniform, the liquid will flow out. Therefore, using the method of Fig. 1, the diameter of the tube is larger. It is difficult to directly support the liquid column. The atmospheric pressure is in the tank, as shown on the surface of B in Figure 2, and then the fluid is pressed against the liquid surface of Liquid A to support the liquid column.