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笔者见过不少关于空气压缩引火仪的文章,大家各有主张,在这里我想谈谈自己在使用过程中的一些体会。初中九年级物理“空气压缩时内能增大”的演示实验,采用的是一个配有活塞的厚玻璃筒,里面放一小团蘸了乙醚的棉花,然后把活塞迅速压下去,观察发生的现象。现象是棉花被点燃,说明压缩空气做功,空气的内
I have seen quite a few articles on air compression ignition devices. Everyone has their own opinions. Here I would like to talk about some of my experiences in the use process. The demonstration experiment of the ninth-grade junior high school physics “Increase in internal pressure during air compression” used a thick glass cylinder equipped with a piston. A small piece of cotton with ether was placed inside, and then the piston was rapidly pressed down to observe the occurrence of phenomenon. The phenomenon is that the cotton is ignited, indicating that the compressed air does work within the air