1、实验 B1 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砝码 M g0.501.001.502.002.503.003.50电压 U / mV 14.829.944.759.874.789.7105.0U/mV120110100(3.32,100.0)90807060504030201000.00.51.01.52.02.53.03.54.0M/gU M 关系图斜率 k100.030.1V / kg3.32g9. 80m / s 2 , UMgBkM力敏传感器灵敏度 Bk30.1g3.07V / N9.802金属环外、内直径的测量次数12345平均值D1(mm)34.9
2、234.9234.9434.9634.9034.928D2(mm)33.1033.1433.1433.0833.1233.1166D1 )2(D1i0.02mm , si 10.011mm ,仪D5511U Dt psD20.68320.02720.01320.03mmA仪11D1D1U D34.930.02 mm16D 2 )2( D2isi10.012mm ,仪0.02mm ,D2551U Dt p sD20.68320.02820.01320.03mmA仪21D2D2U D233.120.02 mm3竖直方向表面张力时电压和拉断后电压的测量次数12345平均值U1(mV)-7.0-7.1
3、-7.1-7.2-7.4U2(mV)-52.8-52.9-52.8-52.9-52.9U(mV)45.845.845.745.745.545.76U )2(U is Ui 10.054mV ,仪0.1mV ,5 51U Ut p s U20.68320.06220.0720.07mVA仪UUU U45.700.07 mV4求表面张力系数U3.14245.6833.12)6.95710 2 N / mB(D1D2 )3.07 (34.92由公式 U r ()(lnU U )2(lnU D 1 ) 2(lnU D 2 )2UD1D2得, U rUU)2U D21U D220.0720.0220.0
4、220.004(U(D1 D2 )2()(34.9333.12) 245.70U(7.00.4)10 2 N / m5求相对误差。水温: t = 27.0,理7.0 10 2 N / m0.4E 100% 5.7%7.0水在不同温度下的表面张力系数(部分)温度 t 0 C121314151617(10 3 N m 1)73.773.673.473.373.173.0温度 t 0 C181920212223(10 3 N m 1)72.872.772.572.472.272.1温度 t 0 C242526272829(10 3 N m 1)71.971.871.671.571.371.2(注:专业文档是经验性极强的领域,无法思考和涵盖全面,素材和资料部分来自网络,供参考。可复制、编制,期待你的好评与关注)