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一、问题湖中停泊着一只装有石块的小船,若将石块掷入水中,那么湖中水面是上升还是下降?在学过初中物理的浮力知识之后,让学生思考回答这个问题是有趣且有益的。可是,问题提出后,学生却回答不一。多数学生答,石块掷入水中,船变轻而上升,故湖中水面是上升的;有的学生答,石块在船上与在湖中体积不变,因而排开水的体积也相等,所以湖中水面位
I. Problems There is a boat with stones in the lake. If the stones are thrown into the water, will the water in the lake rise or fall? After learning the buoyancy knowledge of junior high school physics, it is interesting for students to think about this question. And helpful. However, after the question was asked, the students answered differently. Most of the students answered that the stones were thrown into the water and the boat became lighter and higher, so the water in the lake rose. Some students said that the size of the stones on the boat and in the lake remained the same, so the volume of boiling water was equal. Water level in the lake