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要想把湿袜子从脚上脱下来很费劲。有人说,这是水有黏性,是水把袜子和脚黏在了一起,这种说法不准确。事实上,这是因为空气把袜子和脚黏在了一起,同时水分子之间的引力也起了作用。干袜子和脚之间原来有一层空气,袜子的内外层都受到大气压的作用,脱袜不必克服大气压的压力。袜子湿透了,袜子和脚之间的空气被排掉,袜子的空隙充满水后成了一个封闭的整体,外面的空
It takes a lot of effort to get wet socks off your feet. Some people say that this is water is sticky, water is socks and feet stick together, this statement is not accurate. In fact, this is because the air holds the socks and feet together, and the gravitational pull between the water molecules also plays a role. There is a layer of air between the original socks and the feet, the inner and outer layers of the socks are affected by the atmospheric pressure, and the socks do not have to overcome the pressure of the atmospheric pressure. The socks are soaked, the air between the socks and the feet is drained off, the socks are filled with water and become a closed whole, empty outside