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九年义务教材初中物理第一册中的托里拆利实验装置,在长约lm,一端封闭的玻璃管里装满水银,操作费时且不易将管中空气排除干净.用漏斗装水银容易泄漏,水银是有毒的,有伤口的手指接触水银容易中毒.我们对实验装置作如下改进,可以避免上述问题,有利提高课堂教学效果,
In the nine-year compulsory textbook, the Torricelli experimental device in the first physics booklet filled with mercury in a glass tube with a length of approximately lm and closed at one end. The operation was time-consuming and it was not easy to remove the air from the tube. Mercury leaked from the funnel. Mercury is toxic, and the fingers of the wound are easily exposed to mercury poisoning. We have made the following improvements to the experimental device to avoid the above problems and to improve classroom teaching effectiveness.