用电子天平测定液体表面张力系数结果的分析  

Analysis on the measurement of the surface tension coefficient for the liquid with electronic balance

作　　者：王世亮[1] 马美仲[1] 

机构地区：[1]鲁东大学物理学院,山东烟台264025

出　　处：《大学物理》2010年第3期35-37,43,共4页College Physics

摘　　要：用电子天平测量金属环从水中拉出过程表面张力的变化,对测量结果进行分析修正,明确了用脱环法测定表面张力系数的正确计算公式.A method for measuring the surface tension coefficient with electronic balance by drawing metal loop off liquid level is introduced and the cause for drift of the balance index is explained. A model for the liquid film is built in order to analyze measurement results and compare with theoretical value. Then a formula and corresponding attention are clarified.

关 键 词：表面张力系数 脱环法 极大值 

分 类 号：O552.42[理学—热学与物质分子运动论]