摘要
温度计毛细管中酒精的长度变化ΔL1与温度改变ΔT1成正比,通过拟合ΔL1-ΔT1获得斜率S1,由已知毛细管的横截面积A1和酒精初始体积V1,计算得到酒精的体积膨胀系数.对于毛细管的横截面积和酒精初始体积未知的温度计,可以更换不同量程和精度的温度计,拟合ΔL2-ΔT2获得斜率S2,拟合ΔL1-ΔL2获得斜率S3,由S2,S3,V1和A1计算得到酒精的体积膨胀系数.
The length variations ΔL1 of the alcohol of thermometer capillaries were proportional to the temperature variations ΔT1.The gradient S1 could be obtained by fitting the ΔL1-ΔT1 data.The volume expansion coefficient could be calculated based on the cross-sectional area A1 and the initial volume V1 of the alcohol.For the capillaries whose crosss-ectional area and initial alcohol volume were unknown,the gradient S2 could be obtained by fitting ΔL2-ΔT2 data,and S3 by fitting ΔL1-ΔL2 data by choosing thermometers with different ranges and precisions.The volume expansion coefficient could be given by calculation dependent on the factors S2,S3,V1 and A1.
作者
罗倩
张皓晶
LUO Qian;ZHANG Hao-jing(College of Physics and Electronic Information,Yunnan Normal University,Kunming 650500,China)
出处
《物理实验》
2020年第9期61-63,共3页
Physics Experimentation
关键词
体积膨胀系数
线性拟合
温度计
酒精
volume expansion coefficient
linear fitting
thermometer
alcohol