我们来看一个有趣的实验:如图1所示,有一个钢球和一个钢环,在常温下,钢球的直径略小于钢环的内径,钢球恰好能穿过钢环.现在,给钢球均匀加热一会儿,你会发现钢球不能再通过钢环了.这是因为钢球受热膨胀,体积变大,钢球的直径略大于钢环的内径,所以钢球就不能再通过钢环了.那么,钢球在加热的过程中,体积变化的同时密度会发生变化吗?在 Let’s take a look at an interesting experiment: As shown in Figure 1, there is a steel ball and a steel ring whose diameter is slightly less than the inner diameter of the steel ring at room temperature, When the steel ball is heated for a while, you will find that the steel ball can not pass through the steel ring anymore. This is because the steel ball expands and expands in volume. The diameter of the steel ball is slightly larger than the inner diameter of the steel ring. Well, the ball in the heating process, the volume changes at the same time the density changes? In