CONNECT FOR THERMODYNAMICS: AN ENGINEERI
9th Edition
ISBN: 9781260048636
Author: CENGEL
Publisher: MCG
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Textbook Question
Chapter 1.11, Problem 66P
Repeat Prob. 1–65 for a differential mercury height of 45 mm.
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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.
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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-
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.
Repeat Prob. 1–78 for a gage pressure of 40 kPa.
Chapter 1 Solutions
CONNECT FOR THERMODYNAMICS: AN ENGINEERI
Ch. 1.11 - The value of the gravitational acceleration g...Ch. 1.11 - One of the most amusing things a person can...Ch. 1.11 - An office worker claims that a cup of cold coffee...Ch. 1.11 - What is the difference between the classical and...Ch. 1.11 - Explain why the light-year has the dimension of...Ch. 1.11 - What is the difference between pound-mass and...Ch. 1.11 - What is the net force acting on a car cruising at...Ch. 1.11 - What is the weight, in N, of an object with a mass...Ch. 1.11 - If the mass of an object is 10 lbm, what is its...Ch. 1.11 - The acceleration of high-speed aircraft is...
Ch. 1.11 - The value of the gravitational acceleration g...Ch. 1.11 - A 3-kg plastic tank that has a volume of 0.2 m3 is...Ch. 1.11 - A 2-kg rock is thrown upward with a force of 200 N...Ch. 1.11 - Solve Prob. 113 using appropriate software. Print...Ch. 1.11 - A 4-kW resistance heater in a water heater runs...Ch. 1.11 - A 150-lbm astronaut took his bathroom scale (a...Ch. 1.11 - The gas tank of a car is filled with a nozzle that...Ch. 1.11 - How would you define a system to determine the...Ch. 1.11 - A large fraction of the thermal energy generated...Ch. 1.11 - A can of soft drink at room temperature is put...Ch. 1.11 - How would you define a system to determine the...Ch. 1.11 - How would you describe the state of the air in the...Ch. 1.11 - What is the difference between intensive and...Ch. 1.11 - The specific weight of a system is defined as the...Ch. 1.11 - Is the number of moles of a substance contained in...Ch. 1.11 - Is the state of the air in an isolated room...Ch. 1.11 - What is a quasi-equilibrium process? What is its...Ch. 1.11 - Define the isothermal, isobaric, and isochoric...Ch. 1.11 - What is specific gravity? How is it related to...Ch. 1.11 - What are the ordinary and absolute temperature...Ch. 1.11 - Consider an alcohol and a mercury thermometer that...Ch. 1.11 - Consider two dosed systems A and B. System A...Ch. 1.11 - Consider a system whose temperature is 18C....Ch. 1.11 - Steam enters a heat exchanger at 300 K. What is...Ch. 1.11 - The temperature of a system rises by 130C during a...Ch. 1.11 - The temperature of a system drops by 45F during a...Ch. 1.11 - The temperature of the lubricating oil in an...Ch. 1.11 - Heated air is at 150C. What is the temperature of...Ch. 1.11 - What is the difference between gage pressure and...Ch. 1.11 - Explain why some people experience nose bleeding...Ch. 1.11 - A health magazine reported that physicians...Ch. 1.11 - Someone claims that the absolute pressure in a...Ch. 1.11 - Consider two identical fans, one at sea level and...Ch. 1.11 - The absolute pressure in a compressed air tank is...Ch. 1.11 - A manometer measures a pressure difference as 40...Ch. 1.11 - A vacuum gage connected to a chambee reads 35 kPa...Ch. 1.11 - The maximum safe air pressure of a tire is...Ch. 1.11 - A pressure gage connected to a tank reads 50 psi...Ch. 1.11 - A pressure gage connected to a tank reads 500 kPa...Ch. 1.11 - A 200-pound man has a total foot imprint area of...Ch. 1.11 - The gage pressure in a liquid at a depth of 3 m is...Ch. 1.11 - The absolute pressure in water at a depth of 9 m...Ch. 1.11 - Consider a 1.75-m-tall man standing vertically in...Ch. 1.11 - The barometer of a mountain hiker reads 750 mbars...Ch. 1.11 - The basic barometer can be used to measure the...Ch. 1.11 - A gas is contained in a vertical, frictionless...Ch. 1.11 - Reconsider Prob. 158. Using appropriate software,...Ch. 1.11 - The piston of a vertical piston-cylinder device...Ch. 1.11 - Both a gage and a manometer are attached to a gas...Ch. 1.11 - Reconsider Prob. 161. Using appropriate software,...Ch. 1.11 - A manometer containing oil ( = 850 kg/m3) is...Ch. 1.11 - A manometer is used to measure the air pressure in...Ch. 1.11 - A mercury manometer ( = 13.600 kg/m3) is connected...Ch. 1.11 - Repeat Prob. 165 for a differential mercury height...Ch. 1.11 - The pressure in a natural gas pipeline is measured...Ch. 1.11 - Repeat Prob. 167E by replacing air with oil with a...Ch. 1.11 - Blood pressure is usually measure by wrapping a...Ch. 1.11 - The maximum blood pressure in the upper arm of a...Ch. 1.11 - Consider a U-tube whose arms are open to the...Ch. 1.11 - Consider a double-fluid manometer attached to an...Ch. 1.11 - Calculate the absolute pressure. P1, of the...Ch. 1.11 - Consider the manometer in Fig. 173. If the...Ch. 1.11 - Consider the manometer in Fig. 173. If the...Ch. 1.11 - The hydraulic lift in a car repair shop has an...Ch. 1.11 - Consider the system shown in Fig. 177. If a change...Ch. 1.11 - The gage pressure of the air in the tank shown in...Ch. 1.11 - Repeat Prob. 178 for a gage pressure of 40 kPa.Ch. 1.11 - What is the value of the engineering software...Ch. 1.11 - Determine a positive real root of this equation...Ch. 1.11 - Solve this system of two equations with two...Ch. 1.11 - Solve this system of three equations with three...Ch. 1.11 - Solve this system of three equations with three...Ch. 1.11 - The reactive force developed by a jet engine to...Ch. 1.11 - The reactive force developed by a jet engine to...Ch. 1.11 - A man goes to a traditional market to buy a steak...Ch. 1.11 - What is the weight of a 1-kg substance in N, kN,...Ch. 1.11 - The pressure in a steam boiler is given to be 92...Ch. 1.11 - A hydraulic lift is to be used to lift a 1900-kg...Ch. 1.11 - The average atmosphere pressure on earth is...Ch. 1.11 - Hyperthermia of 5C (i.e., 5C rise above the normal...Ch. 1.11 - The boiling temperature of water decreases by...Ch. 1.11 - A house is losing heat at a rate of 1800 kJ/h per...Ch. 1.11 - The average body temperature of a person rises by...Ch. 1.11 - The average temperature of the atmosphere in the...Ch. 1.11 - A vertical, frictionless pistoncylinder device...Ch. 1.11 - A vertical pistoncylinder device contains a gas at...Ch. 1.11 - The force generated by a spring is given by F =...Ch. 1.11 - An air-conditioning system requires a 35-m-long...Ch. 1.11 - Balloons are often filled with helium gas because...Ch. 1.11 - Reconsider Prob. 1101. Using appropriate software,...Ch. 1.11 - Determine the maximum amount of load, in kg, the...Ch. 1.11 - The lower half of a 6-m-high cylindrical container...Ch. 1.11 - A pressure cooker cooks a lot faster than an...Ch. 1.11 - The pilot of an airplane reads the altitude 6400 m...Ch. 1.11 - A glass tube is attached to a water pipe, as shown...Ch. 1.11 - Consider a U-tube whose arms are open to the...Ch. 1.11 - A water pipe is connected to a double-U manometer...Ch. 1.11 - A gasoline line is connected to a pressure gage...Ch. 1.11 - Repeat Prob. 1110 for a pressure gage reading of...Ch. 1.11 - When measuring small pressure differences with a...Ch. 1.11 - Pressure transducers are commonly used to measure...Ch. 1.11 - Consider the flow of air through a wind turbine...Ch. 1.11 - The drag force exerted on a car by air depends on...Ch. 1.11 - It is well known that cold air feels much colder...Ch. 1.11 - Reconsider Prob. 1116E. Using appropriate...Ch. 1.11 - During a heating process, the temperature of an...Ch. 1.11 - An apple loses 3.6 kJ of heat as it cools per C...Ch. 1.11 - At sea level, the weight of 1 kg mass in SI units...Ch. 1.11 - Consider a fish swimming 5 m below the free...Ch. 1.11 - The atmospheric pressures at the top and the...Ch. 1.11 - Consider a 2.5-m-deep swimming pool. The pressure...
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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 DIarrow_forward1-73 The gage pressure of the air in the tank shown in Fig. PI-73 is measured to be 80 kPa. Determine the differential height h of the mercury column. Oil 80 kPa SG = 0.72 75 cm Air Water 30 cm -Mercury SG = 13.6 FIGURE P1-73arrow_forwardThe pressure inside a competion grade tennis ball is 1.6 times higher than the atmospheric pressure. The diameter and wall thicknwess of the tennis is 66 mm and 2.8 mm, respectively. Considering the atmospheric pressure as 100,000 Pa, determine the stress in the tennis ball at rest. Express the result in MPa with 2 decimal points.arrow_forward
- 1-50 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_forward1-69E The pressure in a natural gas pipeline is measured by the manometer shown in Fig. P1-69E with one of the arms open to the atmosphere where the local atmospheric pressure is 14.2 psia. Determine the absolute pressure in the pipeline. Air 2 in Natural Gas 10 in 25 in 6 in Mercury SG = 13.6 Waterarrow_forwardHow to solve it in SI unit?arrow_forward
- A great ocean is approximately 10 km deep. Determine the pressure at seabed in kPa. The specific gravity of the ocean water is 1.12arrow_forward1-50 A pressure gage connected to a tank reads 500 kPa at a location where the atmospheric pressure is 94 kPa. Determine the absolute pressure in the tank. Answer: Pabs = 594 kPa %3Darrow_forwardA 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.arrow_forward
- 1-63 A manometer containing oil (p = 850 kg/m3) is attached to a tank filled with air. If the oil-level difference between the 2 columns is 80 cm and the atmospheric pressure is 98 kPa, determine the absolute pressure of the air in the tank. Answer: P = 104.7 kPa 1-70arrow_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_forward1-72 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 atrmospheric 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. Air P=? FIGURE P1-72 1-73 Repeat Prob. 1-72 for a differential mercury height of 45 mm. Scanned with CamScanner 1-78 Freshwater and seawater flowing in parallel horizontal pipelines are connected to each other by a double U-tube manometer, as shown in Fig. PI-78. Determine the pressure difference between the two pipelines. Take the density of sea- water at that location to be p umn be ignored in the analysis? 1035 kg/m³. Can the air col- Air Fresb water Sea water Me 1E/ 11-1. FICURE PITS Scanned with CamScanner 1-81 Consider the manometer in Fig. PI-80. If the specific weight of fluid A is 100 kN/m, what is the absolute pressure, in…arrow_forward
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