在初中物理教学中,有一类令学生头疼的关于液面升降的问题,这种问题一般只是对液面的升降作定性的判断而不作定量的计算,很多学生遇到这种问题,都会简单地求助于浮力公式,没有一个解决这类问题的有效方法,往往会陷入计算找不到具体的物理数据,从而无从下手的尴尬境地,如何教学生用一种简单而实 In junior high school physics teaching, there is a class of problems that cause students to have headaches. This problem is generally only a qualitative judgment on the lifting of the liquid surface without quantitative calculation. Many students encounter this problem and will simply To resort to the buoyancy equation, there is no effective way to solve this kind of problem, and often fall into the computational difficulty of finding the physical data, so that it is impossible to start with awkward situations. How to teach students to use a simple and practical method