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对于同一个物理问题,从不同的角度进行分析处理,有时会导出许多不同的解法。如果对这些解法进行分析综合,加以比较对照,然后向学生讲授,就能够大大开阔学生的思路,增强学生分析问题、处理问题的能力。79年全国高等学校统一招生物理试题第三题就是一个很典型的例子。一个潜水艇位于水面下200米。艇上有一个容积V_1=2米~3的贮气钢筒,筒内贮有压缩空气。将筒内部分空气压入水箱(水箱有排水孔和海水相连)排出海水10米~3。此时筒内剩余
For the same physical problem, analyzing and processing from different perspectives sometimes leads to many different solutions. If we analyze and synthesize these solutions, compare them, and then teach them to students, we can greatly broaden our students’ thinking and enhance their ability to analyze problems and handle problems. The third question of the Unified Examination for National Enrollment in Colleges and Universities in 79 years is a typical example. A submarine is located 200 meters below the water surface. The boat has an accumulator cylinder with volume V_1=2m~3, and the cylinder contains compressed air. Press the air inside the cylinder into the water tank (the water tank is connected with the seawater through the drain hole) to discharge the seawater from 10 meters to 3 meters. At this time the remaining tube