利用等效法可以把问题中复杂的物理过程转化为等效的简单的过程来解决,从而使问题简化方便.例1在一圆柱形容器中盛有水,水面漂浮着一个小容器.当将一个实心小塑料球放入小容器中后,大容器中的水面上升的高度是h1.如图1所示,若把这个塑料球从小容器中拿出投入大容器的水中,液面又 Equivalent method can be used to solve the complex physical process of the problem into an equivalent simple process, so as to simplify and simplify the problem. Example 1 A cylindrical container holds water, and the water surface floats a small container. After the solid small plastic ball is placed in a small container, the height of the water rising in the large container is h1. As shown in FIG. 1, if the plastic ball is taken out of the small container and put into the water of the large container, the liquid surface is again