In a laboratory experiment the viscosity of a liquid was measured and the value

Question

In a laboratory experiment the viscosity of a liquid was measured and the value was 102 centipoise (cP). The literature value of the liquid viscosity is 0.3 Pa.s. Calculate the percent error in the experimentally measured viscosity. If a Brookefield viscometer calibration curve was obtained as shown in the Figure 1, determine the calibrated viscosity at 35°C if the measured viscosity is 2.6 Pa.s. Viscosity Difference in viscosity vs. temperature Temp measured publish Difference 400 pa.s oc 56 40 30 20 pa.s 117 115.6 244 291 357 353.8 350 1.4 2.1 2.8 3.2 y=-0.0433x, 3.1985x + 431.89 R2 0.9953 2300 241.9 288.2 250 200 150 100 50 20 30 40 Temp (°C) Figure 1 ©2017 Kennesaw State University. I 100 South Marietta Parkway,nliiets, Georgia,0060 Good Luck

Explanation / Answer

% error = |(absolute value - measured value )|/ absolte value *100

0.3 ps-s = 300 centipoise (1 ps-s= 1000 cp)

% error =(300-102)/300*100 = 66%

given equation y= -0.0433X2 -3.1985X+431.89

AT X=35

Y= 266.9 Pa-s

calibrated data = = difference in viscosity + measured = 266.9+2.6 = 269.5 pa-s

thanks

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