1-72 A mercury manometer (p = 13,600 kg/m) is con-nected to an air duct to measure the pressure inside, The differ-ence in the manometer levels is 15 mm, and the atrmosphericpressure is 100 kPa. (a) Judging from Fig. P1-72, determine ifthe pressure in the duct is above or below the atmosphericpressure. (b) Determine the absolute pressure in the duct.AirP=?FIGURE P1-721-73 Repeat Prob. 1-72 for a differential mercury height of45 mm.Scanned with CamScanner1-78 Freshwater and seawater flowing in parallel horizontalpipelines are connected to each other by a double U-tubemanometer, as shown in Fig. PI-78. Determine the pressuredifference between the two pipelines. Take the density of sea-water at that location to be pumn be ignored in the analysis?1035 kg/m³. Can the air col-AirFresbwaterSeawaterMe1E/ 11-1.FICURE PITSScanned with CamScanner1-81 Consider the manometer in Fig. PI-80. If the specificweight of fluid A is 100 kN/m, what is the absolute pressure,in kPa, indicated by the manometer when the local atmos-pheric pressure is 90 kPa?

13,600 kg/m) is con- 1-72 A mercury manometer (p = nected to an air duct to measure the pressure inside, The differ- ence in the manometer levels is 15 mm, and the atmospheric pressure is 100 kPa. (a) Judging from Fig. P1-72, determine if the pressure in the duct is above or below the atmospheric pressure. (b) Determine the absolute pressure in the duct.

13,600 kg/m) is con- 1-72 A mercury manometer (p = nected to an air duct to measure the pressure inside, The differ- ence in the manometer levels is 15 mm, and the atmospheric pressure is 100 kPa. (a) Judging from Fig. P1-72, determine if the pressure in the duct is above or below the atmospheric pressure. (b) Determine the absolute pressure in the duct.

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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1-53 The water in a tank is pressurized by air, and the pres- sure is measured by a multifluid manometer as shown in Fig. Pl-53. Determine the gage pressure of air in the tank if h = 0.2 m, hy = 0.3 m, and h, = 0.46 m. Take the densities of water, oil, and mercury to be 1000 kg/m', 850 kg/m, and 13,600 kg/m', respectively. Oil Aic Water Mercury FIGURE P1-53 Scanned with CamScanner at a deptn o1 Y m.
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1-53 The water in a tank is pressurized by air, and the pres- sure is measured by a multifluid manometer as shown in Fig. PI-53. Determine the gage pressure of air in the tank if h = 0.2 m, h, = 0.3 m, and h, = 0.46 m. Take the densities of water, oil, and mercury to be 1000 kg/m'. 850 kg/m, and 13.600 kg/m, respectively. Oil Aic Mercuty FIGURE P1-53 Scanned with CamScanner at a aeptn oI Y m. at uic UL 1-56 The absolute pressure in water at a depth of 5 m is read to be 145 kPa. Determine (a) the local atmospheric pres- sure, and (b) the absolute pressure at a depth of 5 m in a liq- uid whose specifc gravity is 0.85 at the same location. Neglectin eration, average 1-64 Scanned with CamScanner D FIGURE P1-58E 1-59 The piston diameters in Fig. Pl-58E are D, = 10 cm and D, = 4 cm. When the pressure in chamber 2 is 2000 kPa and the pressure in chamber 3 is 700 kPa, what is the pres-
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The pressure difference between two points as measured with a manometer is (3) given as P2 - P1 = pgh The following figure shows a single U-tube manometer for measuring pressure difference between points "A" and “B". Air- Water The U-tube manometer. By determining the pressure at point “a" through the left leg and then through the right leg, show that the difference in pressure between point "A" PA and "B" Ps is approximately given by PA - Pa = g(hz – h,)(Px20)
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A manometer is used to measure the pressure of a gas in a tank. The fluid used has a specific gravity of 0.85, and the manometer column height is 55 cm, as shown in Fig. 1-56. If the local atmospheric pressure is 96 kPa, determine the absolute pressure within the tank.
1-69 Freshwater and seawater flowing in parallel horizontal pipelines are connected to each other by a double U-tube manometer, as shown in Fig. Pl-69. Determine the pressure difference between the two pipelines. Take the density of sea- water at that location to be p = 1035 kg/m³. Can the air col- umn be ignored in the analysis? Air Fresh water 40 cm 70 cm Sea 60 cm water 10 cm ` Mercury FIGURE P1-69 1-111 manometer, often one arm of the manometer is inclined to improve the accuracy of reading. (The pressure difference is still proportional to the vertical distance and not the actual length of the fluid along the tube.) The air pressure in a cir- cular duct is to be measured using a manometer whose open arm is inclined 35° from the horizontal, as shown in Fig. PI-111. The density of the liquid in the manometer is 0.81 kg/L, and the vertical distance between the fluid levels in the two arms of the manometer is 8 cm. Determine the gage pressure of air in the duct and the length of the…
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1-99 The force generated by a spring is given by F=kx, where k is the spring constant and x is the deflection of the spring. The spring of Fig. Pl–99 has a spring constant of 8 kN/cm. The pressures are P, = 5000 kPa, P, = 10,000 kPa, and P = 1000 kPa. If the piston diameters are D, = 8 cm and D, = 3 cm, how far will the spring be deflected? Answer: 1.72 cm %3D D2 P2 Spring - P3 P1 DI