用比例式解初中物理题的体会

• 作 者: 徐振科
• 机 构: 陕西白水县白水矿中学,
• 出 处: 中学物理(初中版)
• 发表日期: 1995年02期
• 关键词: 初中物理 物理现象 比例关系 已知量 教学过程 成反比 单位换算 玻璃管 积中

很多初中物理题可能采用列比例式的方法来进行解答。能用比例式解答的物理题的条件是:题目所描述的物理现象能分成开始状态和最后状态,并且由开始状态变为最后状态的过程中至少有一个量是不变的。这个不变的量是由开始状态过渡到最后状态中间的桥梁,叫“中间量”。

Many junior high school physics questions may be answered using column-based methods. The condition of the physical question that can be solved with a proportional answer is that the physical phenomenon described by the question can be divided into a start state and a final state, and at least one quantity in the process from the start state to the final state is constant. This constant volume is the bridge from the start state to the middle of the final state, called the “intermediate quantity”.