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大气压强这部分知识,包括证明大气压存在的现象、测量大气压值的实验、大气压的特点以及生活中大气压的应用。一、大气压的存在例1找一个水杯或玻璃罐头瓶,一块旧棉布。把棉布浸湿后,迭成几层,平放在桌面上,然后给瓶里放上一团棉花,用火燃着,不等火熄灭,就赶快把瓶子扣在湿布上,过一会瓶子就把布吸住了。
Atmospheric pressure This part of knowledge, including to prove the existence of the phenomenon of atmospheric pressure, atmospheric pressure measurements of the experiment, the characteristics of atmospheric pressure and atmospheric pressure applications. First, the existence of atmospheric pressure Example 1 Find a glass or glass cans bottle, a piece of old cotton. Soak the cotton cloth, layer several layers, flat on the desktop, and then put a bottle of cotton on the bottle, with the fire burning, until the fire extinguished, quickly snapped the bottle on a damp cloth, after a while bottle Take the cloth sucked.