能够显示大气压强的实验很多,这里给同学们介绍一例巧用易拉罐演示大气压强的实验。把浸过酒精(或汽油、煤油等助燃剂均可)的棉球点燃,投进空易拉罐内,待一分儿后,用手掌(或湿布)封住罐上盖的子井口,过不久罐就会随着“嘭”地一声响 There are many experiments that can show atmospheric pressure. Here we introduce students to an example of using a can to demonstrate atmospheric pressure. To ignite a cotton ball impregnated with alcohol (or combustion aids such as gasoline or kerosene) into an empty can. After a minute, seal the wellhead of the can lid with the palm (or wet cloth). It will ring with a bang