“空心”问题,是初中物理学习中的一个非常典型的题型,它与初中物理中的许多知识点(如密度、重力、浮力、热量等)都有联系。同学们在解决这类问题时往往“束手无策”。为此,本文将通过列举各类题型,分析解法,以帮助同学们“破解”这一题型。题型一:判断物体是否是空心的例1一个铜球,质量为 The problem of “hollowness” is a very typical type of junior high school physics study. It has many knowledge points (such as density, gravity, buoyancy, heat etc) in junior middle school physics. Students are often “helpless” in solving such problems. To this end, this article will enumerate various types of questions, analyze solutions, to help students “crack ” this type. Type 1: to determine whether the object is hollow Example 1 a copper ball, the quality of