一、问题的提出有一类由于液面升降而引起液体压强及物体所受浮力变化的题型,是近年来各地中考的热点,因为液体内部压强跟深度密切相关,所以求液面高度的变化量△h就成为解答这类问题的关键。许多同学常因对液面的变化情况认识模糊,△h计算错误而导致步步皆错,十分可惜。这部分同学不注重题中的物理情境,机械记忆某道题的结论,作为一般通用公式,思维定势,其结果必定发生知识的负迁移。 I. Problems There are a variety of question types for the liquid pressure and the buoyancy of the objects caused by elevation of the liquid surface. It is a hot spot in local examinations in recent years because the internal pressure of the liquid is closely related to the depth, so the variation of the height of the liquid surface is required. △h becomes the key to answering such questions. Many students often have ambiguous understanding of the changes in the liquid level, and it is a pity that Δh is miscalculated and results in mistakes. This class of students does not pay attention to the physical situation in the question, the conclusion of a mechanical memory of a question, as a general general formula, thinking fixed potential, the result of which must have a negative transfer of knowledge.