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液体内部压强规律是“压强”这一章的重点之一。为了使学生深入理解、牢固掌握液体内部压强公式 p=pgh,华东地区初中物理教材编写协作组编的九年义务教育三年制初中物理试用课本上,安排了“液体内部压强公式的实验验证”的学生分组实验。不少同志反应这个实验不大容易做得好。第一,实验原理是二力平衡,学生不太理解。第二,实验步骤(2)、(3)中测量煤油柱的深度 h′,若一个同学一手拿玻璃
The internal pressure of the liquid is one of the focuses of the chapter “Pressure.” In order to enable students to thoroughly understand and firmly grasp the liquid internal pressure formula p=pgh, in the nine-year compulsory three-year compulsory junior middle school physics trial textbook compiled by the Collaborative Team for the preparation of junior middle school physics textbooks in East China, an experimental verification of the liquid internal pressure formula was arranged. "Student grouping experiment. Many comrades respond that this experiment is not easy to do well. First, the experimental principle is a two-force balance and students do not understand it. Second, the depth of the kerosene column h′ is measured in steps (2) and (3). If a classmate holds glass in one hand,