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请按右图的装置做一个实验.A、B为两只连接在一起但横截面积不同的塑料管,C、D为两只透明塑料管,上端开口,下端分别和A、B连通.A的左端接水龙头,B的右端为出水口,实验时A、B始终保持水平. 封住出水口,向A管注入适量的水.静止后,可以看到C、D两管内水柱保持同一高度,这就是连通器的道理.但如果在向A管注水的同时打开出水口.使水从B管流出,这时“意外”现象发生了:C、D两管内的水柱不再等高,C管内的水柱要比D管高! 看来C、D两管内水柱高度不再相等是由水的流动引起的,这时连通器的原理不再适用.让我们
Please do the experiment according to the device on the right. A and B are two plastic pipes connected together but with different cross-sectional areas. C and D are two transparent plastic pipes. The upper end is open, and the lower ends are connected to A and B respectively. The left end of the faucet, the right end of B is the outlet, during the experiment, A, B always maintain the level. Seal the outlet, the appropriate amount of water into the A tube. After standing, you can see the C, D in the two pipes to maintain the same height of the water column, This is the principle of the communicator. However, if the water outlet is opened at the same time as the water injection to the A pipe, the water flows out of the B pipe. At this time, the “accidental” phenomenon occurs: the water column in the C and D pipes is no longer the same, and the C pipe The water column is higher than the D tube! It seems that the heights of the water column in the C and D tubes are no longer equal to each other caused by the flow of water. At this time, the principle of the connected vessel is no longer applicable. Let us