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《物理教学探讨》03年第一期发表了笔者“解浮力问题的技巧”一文后,陆续收到全国各地多位学生的来信,他们期望更多地获得攻克浮力难关的方法与技巧。现承上文续写几例,以飨读者。1“守恒”法“守恒”就是指系统内各部分的相关物理量在变化时的总量保持不变。在初中物理教学中
In the first issue of the “Physics Teaching Research” in 2003, after publishing the article “The Skill to Solve Buoyancy Problems”, I received letters from a number of students from all over the country. They hoped to obtain more methods and techniques to overcome buoyancy difficulties. We are continuing to write a few examples above to readers. 1 The “conservation” method “conservation” refers to the fact that the total amount of related physical quantities in various parts of the system remains unchanged. In junior high school physics teaching