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在初中《物理》教材第二册“帕斯卡定律”一节中,图5-8的实验,是用活塞压筒里的水,从而可以看到,扎在各个小孔上的橡皮膜都向外凸出,表明液体能够把它受到的压强向各个方向传递。但是,这个实验不能证明活塞对水的压强等于小孔上水对橡皮膜的压强。把图5-8实验做如下改进后,不但可以证明密闭液体能传递压强,而且能证明密闭液体能大小不变地传递压强。
In the section “Pascal’s Law” in the second volume of the “Physics” textbook for junior middle school, the experiment in Figure 5-8 uses the water in the plunger cylinder so that it can be seen that the rubber film that is stuck on each hole is outward. Protruded, indicating that the liquid can transfer the pressure it receives in all directions. However, this experiment cannot prove that the pressure of the piston on water is equal to the pressure of the water on the orifice to the rubber membrane. The following improvement in Figure 5-8 shows that not only can the closed liquid transfer pressure, but also it can prove that the closed liquid can transmit pressure without changing its size.