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在我们的日常生活中,通常觉查不到大气压的存在的。但是,我们只要动一动脑筋,利用某些文具或生活用品,进行实验,就可以观察到有趣的大气压现象。笔者研制了下面一个实验,效果很好,而且取村容易,制作简单,可供读者参考。用瓦棱纸(纸箱纸)剪一块直径约为6cm的圆形硬纸板,在硬纸板中心穿一个小孔。将两根30cm长的棉线,拧成一根,从上往下穿过硬纸板的小孔。在硬纸板下面用透明胶纸,将线端固定在硬纸板上。把硬纸板平放在桌面上,手提线的上端,突然用猛力提起细线,硬纸板会同时提起(如果线断,纸板
In our daily life, we often find no existence of atmospheric pressure. However, as long as we use our brains to use certain stationery or daily necessities to conduct experiments, we can observe an interesting atmosphere. The author developed the following experiment, the effect is very good, and easy to take the village, the production is simple, for readers reference. Cut a round cardboard with a diameter of approximately 6 cm with corrugated paper (carton paper) and wear a small hole in the center of the cardboard. Twist two 30cm long cotton threads into one and run through the cardboard holes from top to bottom. Use transparent tape under the cardboard and fasten the ends of the thread to the cardboard. Put the cardboard flat on the desktop, and at the upper end of the portable line, suddenly use force to lift up the thin line, and the cardboard will lift at the same time (if the line is broken, the cardboard