初中物理第二册《分子运动论的初步知识》一节中,为了说明分子是运动的可用下面的实验来说明。桌上放置两个50毫升的烧杯,一个倒入约25毫升的浓氨水,另一个盛满水,然后往两个烧杯里各滴入几滴酚酞试液,(其中水里课前就滴好酚酞试液)盛氨水的 In the second volume of junior middle school physics, “Preliminary Knowledge of Molecular Movement Theory,” the following experiments are used to illustrate how the molecules are moving. Place two 50 ml beakers on the table, one into about 25 ml concentrated ammonia, the other filled with water, and then drop a few drops of phenolphthalein test solution into each of the two beakers (where the water drops well before class Phenolphthalein test solution)