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小学自然第三册第十四课“水的压力和浮力”的作业是关于水的内部压力的实验。它属于扩展性的自由作业,所说明的问题,对于水下作业的工人和堤坝水库等水利工程都具有重要意义。本册自然的教师用书,建议将本实验安排在课内进行。为了形象地显示液体(水)的内部压强随深度而变化的情况,及同一深度各个方向压强的情况,利用废旧物料,进行简单加工,制作了探测液体内部压强的“探头”及显示压强大小的“显示器”,配合学生作业在课堂上进行了演示,取得了较好的效果。现将实验用具的制作及使用简介如下:
Primary School Volume III, Lesson 14, “Water Pressure and Buoyancy,” is an experiment on the internal pressure of water. It is an expansive and free exercise. The problems described are of great significance to workers in underwater operations and water conservancy projects such as dam reservoirs. Book natural teacher's book, it is recommended that the experiment be arranged in class. In order to vividly show that the internal pressure of the liquid (water) varies with depth and the pressure in all directions at the same depth, the “probe” for detecting the internal pressure of the liquid and the display of the pressure “Monitor”, with the students homework conducted a demonstration in the classroom, and achieved good results. Now the production and use of experimental apparatus are as follows: