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下面介绍的几个实验,是由於我们学校仪器缺乏,并在节省用费的原则下自己动手作出,作为教学演示用的。由於看起来明显易懂,作起来也轻而易举,所以还发生了一些作用,特写出来供大家参考。(一)沸点与压强的关系的实验盛水於烧瓶中,用酒精灯加热,使水沸腾,这时令学生观察水沸腾的现象;然后取去酒精灯,待水沸腾停止后,用长约一米的橡皮管接於揷在瓶塞中的玻璃管上(如图一),用口吸
Several of the experiments described below are due to the lack of equipment in our schools and they are hand-made under the principle of cost savings as a teaching demonstration. As it seems obvious and easy to do, it has also taken some actions and has been featured for your reference. (a) The experiment of the relationship between the boiling point and the pressure is carried in a flask and heated with an alcohol lamp to make the water boil. At this time, the students observe the phenomenon of water boiling; then the alcohol lamp is taken, and after the water is boiled, the length is about one. The meter’s rubber hose is attached to the glass tube in the stopper (as shown in figure 1).