A viscometer, used to measure the viscosity of a liquid, is composed of two 12-cm- long concentric cylinders with radii 4 and 3.8 cm. The outer cylinder is stationary and the inner one rotates. If a torque of 0.046 N-m is measured at a rotational speed of 120 rpm, estimate the viscosity of the liquid. Neglect the contribution to the torque from the cylinder ends and assume a linear velocity profile. Final Answer: 0.1628 N-s/m²?. (0.177 N-s/m2) Water at 30°C is able to climb up a clean glass of 0.2 mm diameter tube due to surface tension. The water-glass angle is 0° with the vertical. How far up the tube does the water climb? At 30 °C water surface tension = 0.0718 N/m and density = 996 kg/m³. %3D Final Answer: 14.7 cm
A viscometer, used to measure the viscosity of a liquid, is composed of two 12-cm- long concentric cylinders with radii 4 and 3.8 cm. The outer cylinder is stationary and the inner one rotates. If a torque of 0.046 N-m is measured at a rotational speed of 120 rpm, estimate the viscosity of the liquid. Neglect the contribution to the torque from the cylinder ends and assume a linear velocity profile. Final Answer: 0.1628 N-s/m²?. (0.177 N-s/m2) Water at 30°C is able to climb up a clean glass of 0.2 mm diameter tube due to surface tension. The water-glass angle is 0° with the vertical. How far up the tube does the water climb? At 30 °C water surface tension = 0.0718 N/m and density = 996 kg/m³. %3D Final Answer: 14.7 cm
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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Transcribed Image Text:c. A viscometer, used to measure the viscosity of a liquid, is composed of two 12-cm-
long concentric cylinders with radii 4 and 3.8 cm. The outer cylinder is stationary and
the inner one rotates. If a torque of 0.046 N-m is measured at a rotational speed of 120
rpm, estimate the viscosity of the liquid. Neglect the contribution to the torque from
the cylinder ends and assume a linear velocity profile.
Final Answer: 0.1628 N-s/m?. (0.177 N-s/m2)
d. Water at 30°C is able to climb up a clean glass of 0.2 mm diameter tube due to surface
tension. The water-glass angle is 0° with the vertical. How far up the tube does the
water climb? At 30 °C water surface tension = 0.0718 N/m and density = 996 kg/m³.
Final Answer: 14.7 cm
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