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全日制十年制学校高中课本物理上册第九章第二节中,有一个演示在温度不变的情况下,气体的压强跟体积成反比的实验。实验使用了比重大的水银,效果比较明显。但是,水银有毒,实验中稍不小心水银极易洒落出来,不安全,且水银价格也比较贵。目前,许多学校没有采用这个实验。有些教师想到用水柱来代替水银柱,由于水的比重是水银比重的1/13.6,要产生同样大小的压强差,水柱的高度是水银柱高度的13.6倍,而在实验中,B管的高度变化一般只在2米左右,
In a full-time, 10-year high school textbook, the physics volume of Chapter 9 of Chapter 9 demonstrates an experiment in which the pressure of the gas is inversely proportional to the volume when the temperature is constant. The use of mercury, which has a significant proportion in the experiment, is more effective. However, the mercury is toxic. Mercury is easily spilled out of the experiment. It is unsafe and mercury is expensive. At present, many schools do not use this experiment. Some teachers think of water column instead of mercury column. Because the specific gravity of water is 1/13.6 of the mercury’s specific gravity, to produce the same size pressure difference, the height of the water column is 13.6 times the height of the mercury column, and in the experiment, the height of the B tube. Changes are generally only about 2 meters.