Thermodynamics: An Engineering Approach
8th Edition
ISBN: 9780073398174
Author: Yunus A. Cengel Dr., Michael A. Boles
Publisher: McGraw-Hill Education
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Textbook Question
Chapter 1.11, Problem 65P
Reconsider Prob. 1–61. Using appropriate software, investigate the effect of the manometer fluid density in the range of 800 to 13,000 kg/m3 on the differential fluid height of the manometer. Plot the differential fluid height against the density, and discuss the results.
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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.
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…
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. P1–99 has a spring constant of 8 kN/cm. The pressures are P1 = 5000 kPa, P2 = 10,000 kPa, and P3 = 1000 kPa. If the piston diameters are D1 = 8 cm and D2 = 3 cm, how far will the spring be deflected?
Chapter 1 Solutions
Thermodynamics: An Engineering Approach
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- Calculate the absolute pressure, P1, of the manometer shown in Fig. P1–73 in kPa. The local atmospheric pressure is 758 mmHg.arrow_forward1-53 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-arrow_forward1-74 Consider a U-tube whose arms are open to the atmo- sphere. Now water is poured into the U-tube from one arm. and light oil (p = 790 kg/m') from the other. One arm con- tains 70-cm-high water, while the other arm contains both fluids with an oil-to-water height ratio of 4. Determine the height of each fluid in that arm. -69 Oil 70 cm Water FIGURE P1-74arrow_forward
- 1-74 Consider a U-tube whose arms are open to the atmo- sphere. Now water is poured into the U-tube from one arm, and light oil (p tains 70-cm-high water, while the other arm contains both fluids with an oil-to-water height ratio of 4. Determine the height of each fluid in that arm. 790 kg/m') from the other. One arm con- Oil 70 cm Water FIGURE P1-74 hparrow_forward1-50 The water in a tank is pressurized by air, and the pressure is measured by a multifluid manometer as shown in Fig. P1-50. Determine the gage pressure of air in the tank if 0.2 m, h, = 0.3 m, and h, of water, oil, and mercury to be 1000 kg/m³, 850 kg/m², and 13,600 kg/m², respectively. 0.4 m. Take the densities Oil Air 1 2 h2 Water Mercury FIGURE P1-50arrow_forwardA gasoline line is connected to a pressure gage through a double-U manometer, as shown in Fig. P1–110. If the reading of the pressure gage is 370 kPa, determine the gage pressure of the gasoline line.arrow_forward
- 1-108 A glass tube is attached to a water pipe, as shown in Fig. P1-108. If the water pressure at the bottom of the tube is 110 kPa and the local atmospheric pressure is 99 kPa, deter- mine how high the water will rise in the tube, in m. Take the density of water to be 1000 kg/m³. Patm = 99 kPa h = ? Water FIGURE P1-108arrow_forward1-31C Consider an alcohol and a mercury thermometer that read exactly 0°C at the ice point and 100°C at the steam point. The distance between the two points is divided into 100 equal parts in both thermometers. Do you think these thermometers will give exactly the same reading at a temper- ature of, say, 60°C? Explain.arrow_forward1-71 Consider a U-tube whose arms are open to the atmo- sphere. Now water is poured into the U-tube from one arm, and light oil (p = 790 kg/m³) from the other. One arm contains 70-cm-high water, while the other arm contains both fluids with an oil-to-water height ratio of 4. Determine the height of each fluid in that arm. Hello, please solve the quesțion without explanation with mentioning my name in (((morteza Ali Qasim))))paper and a beautiful font. Thank you doctor. Oil 70 cm Water Don't forget my name, please, God bless you FIGURE P1-71arrow_forward
- 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 DIarrow_forwardRepeat Prob. 1–78 for a gage pressure of 40 kPa.arrow_forwardThe surface tension of a liquid is being measured with a ring as shown in the figure. The ring has an outside diameter of 10 cm and an inside diameter of 9.5 cm. The mass of the ring is 10 g. The force required to pull the ring from the liquid is the weight corresponding to a mass of 16 g. What is the surface tension of the liquid (in N/m)? Ringarrow_forward
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