《解放日报》曾报道一则消息:“在华东师大讲学的德国专家夜莺教授前往虹桥中学给学生上了一堂物理课,还演示了四个精彩的物理小实验,使学生们学习物理兴趣大增。”这里来分析一下当时是如何激励学生学习的积极性的。其中有一个揭示大气压强的演示实验十分生动有趣,那就是取出废弃的易拉罐,装上少许水,在酒精灯或电炉上缓慢加热片刻直至沸腾,随后迅速倒置在预先准备好的一只装有水的玻璃器皿里,瞬间易拉罐“喀嚓”一声压瘪了,声形俱全,这 “Liberation Daily” once reported a message: “Professor Nightingale, a German expert in East China Normal University lectured, went to Hongqiao Middle School to give students a physics class, and also demonstrated four wonderful physics experiments to make students learn physical interest. ”.“ Here to analyze how the incentives for students to learn at that time were positive. One of the demonstration experiments that revealed the atmospheric pressure was very lively and interesting. It was to take out the cans, put a little water on it, slowly heated on an alcohol lamp or electric stove for a while until it was boiling, and then quickly inverted it to a ready-made one filled with water. In the glassware, instant cans ”click" sound pressure, and sound shape, this