摘要
针对学生在利用FD-NST-I型液体表面张力系数测定仪测量液体表面张力系数时,对何时读取数字电压表的示数存在争议,通过对吊环离开液面后液膜拉脱过程的5个阶段的受力分析、液膜拉脱过程的数学讨论以及微观解释三个方面对该实验数据的最佳读取时刻进行分析讨论以及对实验数据的对比分析,得出在测量时应该读取的是数字电压表在吊环拉脱液膜过程中的最大值。
In the process that students used FD-NST-I liquid surface tension coefficient measuring instrument to measure the liquid surface tension coefficient, when the number of digital voltmeter was controversial. The best reading time of the experimental data was analyzed and discussed from three aspects, namely the force analysis of five stages of pulling escape process of ring left liquid membrane, the mathematical discussion and the micro-interpretation of pulling escape process of liquid membrane.The experimental data were compared and analyzed. Results showed that in the measurement, the maximum value of the digital voltmeter in the process that the ring pulls off the liquid membrane should be read.
出处
《大学物理实验》
2017年第5期74-77,共4页
Physical Experiment of College
基金
辽宁科技大学实验教学改革项目
关键词
液体表面张力
拉脱法
受力分析
数学讨论
liquid surface tension
pulling escape
force analysis
mathematical discussion
