(Solved): experiment of viscosity data - experiment - measurent of viscosity
Table 3.1 Observations
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experiment of viscosity
data - experiment - measurent of viscosity
Table 3.1 Observations
Objective: Determine the viscosity of a liquid using the falling ball viscosimeters. Discussion Viscosity is a property of a fluid that resists shearing motions. The viscosity of a fluid can be measured using the supplied falling ball viscosimeters, as shown in Figure 3.1. The viscosity of a liquid can be calculated using the viscosimeters from Eq. 3.1, as follows: Equation 3.1 ?=K(?t???)t Where: ?=K=?2?=?=t=? viscosity in centipoises (cP) viscosimeter constant density of ball (grams /ml ) 2.53 for glass 8.02 for stainless steel 16.6 for tantalum density of liquid (grams /ml ) time of descent (minutes) ? and the approximate K values for each size viscometer is as follows:
Questions: -Compare your experimental viscosity results with the values of the literature. Are there any differences? If so, explain, why? -Determine the percent error between you values and the literature values. % Error =A?E?A??x100E= Experimental value A= True or accepted value
The density of the liquid can be measured, per Experiment No. 2, in Kg/m3 and converted to grams/ml by multiplying Kg/m3 by 10?3. Temperature will have an effect on the density of a liquid and, thus, viscosity will be affected by changes in temperature. For more accurate measurements, a water bath could be used. The viscometers are supplied with a glass ball, a stainless steel ball, and a tantalum ball which doubles the range of each viscosimeter. The size viscosimeter and type of ball has a range in centipoise (cP), as follows: Equipment and Materials - Hampden MODEL H-6535 Hydrostatics Bench - Viscosimeters (3) with glass, stainless steel and tantalum balls. - Pipet - Stopwatch - 1000ml beaker