Perhaps the two bottles in the question are misleading. In fact, these two are ONE SAME bottle in two states. Since the liquid is incompressible, the air volumn remains identical, so is the air pressure. Then, it's obvious that P_A=P_B
@@wty1992 确实是你想错了。空气是关键。如果空气量/体积不同都会有不同结果。 你只看液柱高度,结果就是你忽略了液柱顶部受到的来自容器的压力。这个压力在不同情况下是不同的。 ho g h这个公式本质上不是告诉你压力,而是压力差。 1km发生不了,因为此题里的空气大约为大气压,水柱最多10米,然后就会出现真空。
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