分子间存在引力实验的改进

Improvement on the Experiment of Intermolecular Gravitation

“分子引力”实验是初中物理“分子运动论”教学中的一个重要的验证性演示实验.传统的演示实验存在着实验现象不明显,成功率不高,不便于学生观察等缺陷.利用甘油能增加液体膜韧性的特点,利用液体膜拉动吸管运动可以让学生很直观地观察到分子间的引力,降低学生对于微观现象的理解难度.

The experiment of"molecular gravitation"is an important demonstration experiment in the teaching of"kinetic theory".The traditional demonstration experiment has some defects,such as the phenomenon is not obvious,low success rate,Inconvenient for observing.By using glycerol to increase the toughness of liquid membrane,students can directly observe the intermolecular gravitation and reduce the difficulty of understanding the microscopic phenomena.