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初二物理大气的压强一节，通过演示托里拆利实验，说明大气压强跟７６０ ｍｍ高水银柱产生的压强相等，从而得出大气压的值约为１．０１×１０５Ｐａ．该实验的演示方法及原理，有以下几点难以为学生理解． １．往托里拆利管灌注水银排尽管内空气后，倒插入水银槽中后，管内水
The pressure of the physical atmosphere in the second day of the second section shows that the atmospheric pressure is equivalent to the pressure generated by the 760 mm high mercury column, demonstrating that the atmospheric pressure is approximately 1.01×105 Pa. The demonstration methods and principles of the experiment are as follows: It is difficult for students to understand. 1. After pouring the mercury row into the Toriri tube, the inner water is poured into the mercury tank after pouring it into the mercury tank.