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九年义务教育三年制初级中学教科书《物理》第一册,第130页.图11-4介绍了一个大气压的实验:先在瓶底铺一层沙子,把浸有酒精的棉球点燃,放入瓶内,再用剥了壳的熟鸡蛋堵住瓶口,如图1所示(此图是课本上的图11-4),蛋就会自动地徐徐进入瓶内,逗人生趣。但是,这个实验也有不足之处:要准备沙子及酒精棉球,用火烧,较为麻烦,弄不好,还会使玻璃瓶炸裂或烫伤手。再者,火只能消
Nine-year Compulsory Education Three-year Primary Middle School Textbook “Physics” Volume 1, page 130. Figure 11-4 describes an atmospheric pressure experiment: a layer of sand was laid on the bottom of the bottle, and a cotton ball soaked in alcohol was ignited. Put it in the bottle, and then use a cooked egg that has been stripped of the shell to close the bottle, as shown in Figure 1 (this picture is in Figure 11-4 on the textbook), the egg will automatically slowly enter the bottle, funny. However, this experiment also has its disadvantages: to prepare sand and alcohol tampon, to use fire, it is more troublesome, and it will make glass bottles burst or burn their hands. In addition, the fire can only eliminate