Answered: (1) 2) 11 cm Mercury manometer

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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(1) Given the working form of the Bernoulli equation as v2 + gz + dW - F dm Where s is the friction heating per unit mass dQ F = Au dm Given also that friction heating in laminar flow of Newtonian fluids in circular pipes is given as -AP F = = -gAz = Q Ax µ 128 Ax is change in the x-direction. A typical capillary viscometer has a large-diameter reservoir and a long, small diameter, vertical tube. The sample is placed in the reservoir and the flow rate due to gravity is measured. The tube is 0.1 m long and has a 1 mm ID. The height of the fluid in the reservoir above the inlet to the tube is 0.02 m. The fluid being tested has a density of 1050 kg / m'. The flow rate is 10* m³ / s. What is the viscosity of the fluid? Typical capillary viscometer
An iron bar 2.0 cm x 3.0 cm x 10.0 cm at a temperature of 95 °C is dropped into a barrel of water at 25 °C. The barrel is large enough so that the water temperature rises negligibly as the bar cools. The rate at which heat is transferred from the bar to the water is given by the expression Q (J/min) = UA (T₁-T) where U = 0.05 J/(min cm °C)] is a (cm) is the exposed surface area of the bar, T, and T are the surface temperature of the bar and the water temperature, respectively. The heat capacity of the bar is 0.46 J/g °C). Heat conduction in iron is rapid enough for the temperature T, to be considered uniform throughout the bar. a) Write an energy balance on the bar b) Plot the expected plot of T, versus t and then curve fitting. M = (60 cm³) (7.7 g/cm³) = 462 g C, = 0.46 kJ/(kg-°C), T = 25°C U= 0.050 J/(min-cm².°C) 4 = 2[(2)(3)+(2)(10)+(3)(10)]cm² = 112 cm²
A pitot tube, with a U-tube manometer containing mercury (density 13,600 kg/m³) is used to measure the velocity of water flowing through a tube. The manometer shows a reading of 20mm Hg. If the tube coefficient is 1.5, calculate the velocity of the flowing water.

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