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1、实验4.1拉脱法测液体表面张力系数实验数据及其数据处理:1.硅压阻力敏传感器定标祛码M/g0.501.001.502.002.503.003.50电压UZmV14.829.944.759.874.789.7105.0斜率A=理2=3O1V3.32=9.8011zns2,U=MgB=kM力敏传感器灵敏度B=-=屈1=3.07V/Ng9.80112.金属环外、内直径的测量次数123456平均值D(mm)34.9234.9234.9434.9634.9034.9034.923D2(mm)33.1033.1433.1433.0833.1233.1433.120次(D1A)24(D1)=V=0.024/
2、wm,(D1)=0.02m/n,1 Y61%=SA+Nb=00242+0.022=0.03mznD1Ud=34.920.03mm1u火(-瓦)2An(A)=CrO=0.025mw,(D.)=0.02/w/n,2 Y6-1UM=4+=0.0252+0.022=0.03mmD2UDi=33.120.03ww3.竖直方向表面张力时电压和拉断后电压的测量次数123456平均值U(mV)-7.0-7.1-7.1-7.2-7.4-7.5U2(mV)-52.8-52.9-52.8-52.9-52.9-53.0U(mV)n45.845.745.745.545.545.68(Ui-U)2AA(AU)=Atz=1
3、=0.14mV,()=0.07V,V6-1UAU=A及a+及B=0.142+0.072=0.16mVUUu=45.68O.16V4 .求表面张力系数=6.9571()2TVw(745.68a=-=B(DD2)3.1423.07(34.92+33.12)八,、1na.231Iarr.2z16rr.2由公式“=j而UQ+(西J+(EU),(51+d2)2=0.4%心2+0吧00二V45.68(34.92+33.12)2Ua=a-Ur=6.95710-20.4%=2.8X1OTN/加a(=(6.9570.028)10-2/V/w5 .与理论值比较,求相对误差。水温:f=27.0C,理=7.15x10-2niwE一啕X100%=I15-O*X1()0%=2.7%理7.15水在不同温度下的表面张力系数(部分)温度“C121314151617a(10-3Nm-i)73.773.673.473.373.173.0温度“C181920212223(1()7N加T)72.872.772.572.472.272.1温度4C242526272829aQ0-3Nm)71.971.871.671.571.371.2