一道浮力习题引起了学生们在解法上的剧烈争论,为了纠正错误观点,巩固已学知识,我引导学生们做了探索性实验,现将该题的争论焦点和探索过程简介如下。(题)如图所示,一个容器下层装有水银,上层装有水,在水银和水的分界面上,浮着一个边长为4厘米的正方体铜块,铜块上表面 A buoyancy exercise caused students to argue fiercely on the solution. In order to correct the wrong viewpoint and consolidate the learned knowledge, I guided the students to make exploratory experiments. Now the controversy and the exploration process of the topic are summarized as follows. (Title) As shown in the figure, a container is filled with mercury on the lower layer and water is placed on the upper layer. On the interface between mercury and water, a square copper block with a side length of 4 cm floats on the upper surface of the copper block.