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“覆杯实验”是初中物理教学中用来验证大气压存在及大气内部向各个方向都有压强的一个演示实验.该实验所需的实验器材简单易取,操作过程方便快捷,即取一个塑料杯,在杯中装入一定量的水(水不一定要装满),再取一张小纸片(或玻璃片、塑料片等)盖于杯口并用手压着纸片将塑料杯倒置过来,然后将压着纸片的手拿开.这时,你会看到杯中的水和杯口的纸片并没有掉下来,纸片神奇地将水托住了.而且,只要操作正确,该实验的成功率极高,
“Covering cup experiment” is a demonstration experiment used to verify the existence of atmospheric pressure and the pressure inside the atmosphere in all directions in the junior middle school physics teaching. The experiment equipment required for the experiment is simple and easy to take, and the operation process is convenient and quick. In a plastic cup, a certain amount of water is filled in the cup (the water does not have to be full), and a small piece of paper (or glass, plastic, etc.) is placed over the cup and the paper cup is pressed against the plastic cup. Set it upside down, and then remove the paper holding the paper. At this time, you will see that the water in the cup and the paper in the cup have not fallen down. The paper magically holds the water. And, as long as the operation Correctly, the success rate of this experiment is extremely high.