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学生做《验证玻意耳—马略特定律》的实验时,误差一般在10％以上,甚至更大些,效果很不理想。经分析,误差主要来自几个方面:(1)在完成用测力计竖直上提注射器活塞,并读取拉力数值和相应的空气柱体积数值的操作步骤时,学生手眼不能兼顾,造成读数误差。另外,提拉测力计的手,不能始终维持在一定位置上,势必造成测力计示数波动,导致气压波动,致使拉力数值和气柱体积数值不是注射器内气体在同一状态
When students do the experiment of verifying the Boyle-Marlow law, the error is generally above 10%, or even greater, and the effect is not ideal. After analysis, the error mainly comes from several aspects: (1) When completing the operation of lifting the plunger of the syringe vertically with the dynamometer and reading the pull force value and the corresponding volume value of the air column, the student’s hand-eye cannot take into account, resulting in readings error. In addition, the pull dynamometer’s hand cannot always be maintained at a certain position, which will inevitably cause the dynamometer to fluctuate, resulting in pressure fluctuations. As a result, the pull force value and the air column volume value are not in the same state as the gas in the syringe.