Answered: 3. A skater weighing 500 N skates at 10…

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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please solve the number 3 (write the given, required, and solution)

Transcribed Image Text:2. A vertical cylinder of diameter 16 cm rotates concentrically inside another cylinder of diameter 16.1 cm. The clearance space between the cylinders is filled with a liquid of unknown viscosity which has a linear viscosity profile and both cylinders are 24 cm high. Find the viscosity of the liquid if a torque of 10 Nm is required to rotate the inner cylinder at a speed of 50 rpm. 3. A skater weighing 500 N skates at 10 m/s and is supported by an average skating area of 10 cm². If the viscosity of water is 1 centipoise and the coefficient of friction between skates and ice is 0.02, then find the thickness of thin film of water existing between the skates and the ice. 4. A logging firm in Isabella operates a Diesel Electric Plant to supply its electric energy requirements. During a 2-hour period, the plant consumed 250 gallons of fuel at 80°F and produced 2900 kW-hrs. Industrial fuel is used at 30°API and was purchased at P30/li at 60°F. Determine the overall thermal efficiency of the plant.

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