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.
出处
《大学物理》
北大核心
2010年第3期35-37,43,共4页
College Physics
关键词
表面张力系数
脱环法
极大值
surface tension coefficient
loop-off method
maximum
