Fox and McDonald's Introduction to Fluid Mechanics
9th Edition
ISBN: 9781118912652
Author: Philip J. Pritchard, John W. Mitchell
Publisher: WILEY
expand_more
expand_more
format_list_bulleted
Textbook Question
Chapter 3, Problem 79P
Hot-air ballooning is a popular sport. According to a recent article, “hot-air volumes must be large because air heated to 150°F over ambient lifts only 0.018 lbf/ft3 compared to 0.066 and 0.071 for helium and hydrogen, respectively.” Check these statements for sea-level conditions. Calculate the effect of increasing the hot-air maximum temperature to 250°F above ambient.
Expert Solution & Answer
Trending nowThis is a popular solution!
Students have asked these similar questions
Evaluate the volume occupied by 8,968 kg of air at a gage pressure of 723 kPa and a temperature of 686 C . Calculate air density under the same conditions.
A room 20 ft long, 15 ft wide, and 8 ft high has standard atmospheric pressure and temperature of 2116 lb/ft2 and 59°F, respectively. Calculate the percentage change in the total weight of air in the room when the air temperature is reduced to –13°F (a very cold winter day), assuming that the pressure remains the same at 2116 lb/ft2.
The pilot of an airplane reads the altitude 6400 m and the absolute pressure 45 kPa when flying over a city. Calculate the local atmospheric pressure in that city in kPa and in mmHg. Take the densities of air and mercury to be 0.828 kg/m3 and 13,600 kg/m3 , respectively
Chapter 3 Solutions
Fox and McDonald's Introduction to Fluid Mechanics
Ch. 3 - Because the pressure falls, water boils at a lower...Ch. 3 - Ear popping is an unpleasant phenomenon sometimes...Ch. 3 - When you are on a mountain face and boil water,...Ch. 3 - Your pressure gauge indicates that the pressure in...Ch. 3 - A 125-mL cube of solid oak is held submerged by a...Ch. 3 - The tube shown is filled with mercury at 20C....Ch. 3 - Calculate the absolute and gage pressure in an...Ch. 3 - An open vessel contains carbon tetrachloride to a...Ch. 3 - A hollow metal cube with sides 100 mm floats at...Ch. 3 - Compressed nitrogen (140 lbm) is stored in a...
Ch. 3 - If at the surface of a liquid the specific weight...Ch. 3 - In the deep ocean the compressibility of seawater...Ch. 3 - Assuming the bulk modulus is constant for sea...Ch. 3 - An inverted cylindrical container is lowered...Ch. 3 - A water tank filled with water to a depth of 16 ft...Ch. 3 - A partitioned tank as shown contains water and...Ch. 3 - Consider the two-fluid manometer shown. Calculate...Ch. 3 - The manometer shown contains water and kerosene....Ch. 3 - Determine the gage pressure in kPa at point a, if...Ch. 3 - With the manometer reading as shown, calculate px....Ch. 3 - Calculate px py for this inverted U-tube...Ch. 3 - An inclined gauge having a tube of 3-mm bore, laid...Ch. 3 - Water flows downward along a pipe that is inclined...Ch. 3 - A reservoir manometer has vertical tubes of...Ch. 3 - A rectangular tank, open to the atmosphere, is...Ch. 3 - The sketch shows a sectional view through a...Ch. 3 - The manometer reading is 6 in. when the funnel is...Ch. 3 - A reservoir manometer is calibrated for use with a...Ch. 3 - The inclined-tube manometer shown has D = 96 mm...Ch. 3 - The inclined-tube manometer shown has D = 76 mm...Ch. 3 - A barometer accidentally contains 6.5 inches of...Ch. 3 - A water column stands 50 mm high in a 2.5-mm...Ch. 3 - Consider a small-diameter open-ended tube inserted...Ch. 3 - Compare the height due to capillary action of...Ch. 3 - If atmospheric pressure at the ground is 101.3 kPa...Ch. 3 - If the temperature in the atmosphere is assumed to...Ch. 3 - A hydropneumatic elevator consists of a...Ch. 3 - Semicircular plane gate AB is hinged along B and...Ch. 3 - A circular gate 3 m in diameter has its center 2.5...Ch. 3 - For the situation shown, find the air pressure in...Ch. 3 - What is the pressure at A? Draw a free body...Ch. 3 - A plane gate of uniform thickness holds back a...Ch. 3 - A rectangular gate (width w = 2 m) is hinged as...Ch. 3 - Gates in the Poe Lock at Sault Ste. Marie,...Ch. 3 - Calculate the minimum force P necessary to hold a...Ch. 3 - Calculate magnitude and location of the resultant...Ch. 3 - Calculate magnitude and location of the resultant...Ch. 3 - A window in the shape of an isosceles triangle and...Ch. 3 - A large open tank contains water and is connected...Ch. 3 - The circular access port in the side of a water...Ch. 3 - The gate AOC shown is 6 ft wide and is hinged...Ch. 3 - The gate shown is hinged at H. The gate is 3 m...Ch. 3 - For the dam shown, what is the vertical force of...Ch. 3 - The parabolic gate shown is 2 m wide and pivoted...Ch. 3 - An open tank is filled with water to the depth...Ch. 3 - A dam is to be constructed using the cross-section...Ch. 3 - The quarter cylinder AB is 10 ft long. Calculate...Ch. 3 - Calculate the magnitude, direction (horizontal and...Ch. 3 - A hemispherical shell 1.2 m in diameter is...Ch. 3 - A cylindrical weir has a diameter of 3 m and a...Ch. 3 - If you throw an anchor out of your canoe but the...Ch. 3 - A hydrometer is a specific gravity indicator, the...Ch. 3 - A cylindrical can 76 mm in diameter and 152 mm...Ch. 3 - If the 10-ft-long box is floating on the oil-water...Ch. 3 - The timber weighs 40 lb/ft3 and is held in a...Ch. 3 - Find the specific weight of the sphere shown if...Ch. 3 - The fat-to-muscle ratio of a person may be...Ch. 3 - An open tank is filled to the top with water. A...Ch. 3 - If the timber weighs 670 N, calculate its angle of...Ch. 3 - The barge shown weighs 40 tons and carries a cargo...Ch. 3 - Quantify the experiment performed by Archimedes to...Ch. 3 - Hot-air ballooning is a popular sport. According...Ch. 3 - It is desired to use a hot air balloon with a...Ch. 3 - The opening in the bottom of the tank is square...Ch. 3 - A balloon has a weight (including crew but not...Ch. 3 - A helium balloon is to lift a payload to an...Ch. 3 - The stem of a glass hydrometer used to measure...Ch. 3 - A sphere of radius R is partially immersed to...Ch. 3 - A sphere of 1-in.-radius made from material of...Ch. 3 - You are in the Bermuda Triangle when you see a...Ch. 3 - Three steel balls (each about half an inch in...Ch. 3 - A proposed ocean salvage scheme involves pumping...
Additional Engineering Textbook Solutions
Find more solutions based on key concepts
In each case, determine the moment of the force about point O. Prob. P3-1
Statics and Mechanics of Materials (5th Edition)
Using Fig. 4-1, draw a conclusion about the comfort of a mixed group of men and women in typical seasonal cloth...
Heating Ventilating and Air Conditioning: Analysis and Design
1.1 What is the difference between an atom and a molecule? A molecule and a crystal?
Manufacturing Engineering & Technology
ICA 7-30
A circular window has a 10-inch [in] radius. What is the surface area of one side of the window in uni...
Thinking Like an Engineer: An Active Learning Approach (4th Edition)
The beam supports the distributed load shown. Determine the resultant internal loadings on the cross section at...
Mechanics of Materials (10th Edition)
A 100-hp car engine has a drive shaft rotating at 2000 RPM. How much torque is on the shaft for 25% of full pow...
Fundamentals Of Thermodynamics
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.Similar questions
- If 15.7 m³ of atmospheric air at 149 degrees centigrade temperature are compressed to a volume of 11.2 m³ at zero degrees centigrade, what will be the vacuum pressure of air in kPav?arrow_forward1.3 kg of air are held at 6.89 kpa and 38 °C. Given that R_air = 88.89 J/kg k, what is the volume of the container?arrow_forwardA pressure vessel with gaseous air inside is shown above. The internal volume of the pressurized container is constant. If the pressurized container is used in the aircraft, present at least two suggestions applicable in the system to keep the gas pressure inside in case of temperature change due to altitude change.arrow_forward
- A constant volume container holds 10 kg of air at a temperature of 20°C and a pressure of 150 kPa. Rudeair is pressed and in the last case the pressure rises to 250 kPa and the temperature to 30°C. rough printedCalculate the mass of the air. (The ideal gas constant value for air is 0.287 kJ/kgK.)arrow_forwardThe basic barometer can be used as an altitude- measuring device in airplanes. The ground control reports a barometric reading of 760 mmHg while the pilot’s reading is 420 mmHg. Estimate the altitude of the plane from ground level if the average air density is 1.20 kg/m3.arrow_forwardHow do hot air balloons float? Use the language of Newton’s second law, and the language of convection.arrow_forward
- You and Liza Soberano are in an aircraft flying steadily at 4,300m above sea level and you are about to experience your first sky dive with her. You jumped first but Liza, due to hesitation, jumped after few seconds. Supposed that in an instant, the barometric pressure at your elevation is 85.0 kPa and Liza is higher from you by 80om. Determine the barometric pressure at Liza's elevation assuming that pressure and temperature at sea level are 101.3 kPa and 25 deg.C respectively. Use lapse rate = 0.00650 K/m %3Darrow_forwardA regulation basketball is initially flat and is then inflated to a pressure of approximately 23 lb/in.² absolute. Consider the air temperature to be constant at 50°F. Find the mass of air required to inflate the basketball. The basketball's inside radius is 4.67 in. m = i slug.arrow_forwardEarly mountaineers boiled water to estimate their altitude. If they reach the top and find that water boils at 84°C, approximately how high is the mountain?arrow_forward
- A skydiver skydives from the 700 hPa level. It's a warm, dry autumn day with a surface temperature of 77° F and an atmosphere in hydrostatic balance. What height did I jump from? Assume the density at the surface and in the layer is 1.2 kg m-3. Gravity is 9.81 m s-2 and the gas constant for dry air is 287 J kg1 K-1. Also, the atmosphere can be treated as an ideal gas.arrow_forwardBalloons are often filled with helium gas because it weighs only about one-seventh of what air weighs under identical conditions. The buoyancy force, which can be expressed as Fb = ? airgVballoon, will push the balloon upward. If the balloon has a diameter of 12 m and carries two people, 70 kg each Using appropriate software, investigate the effect of the number of people carried in the balloon on acceleration. Plot the acceleration against the number of people, and discuss the results Assume the density of air is ? =1.16kg/m3, and neglect the weight of the ropes and the cagearrow_forward2.For the International Standard Atmosphere below 10 km where the temperature is equal to -20°C, find out the partial 孟书杰 191861247arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Elements Of ElectromagneticsMechanical EngineeringISBN:9780190698614Author:Sadiku, Matthew N. O.Publisher:Oxford University PressMechanics of Materials (10th Edition)Mechanical EngineeringISBN:9780134319650Author:Russell C. HibbelerPublisher:PEARSONThermodynamics: An Engineering ApproachMechanical EngineeringISBN:9781259822674Author:Yunus A. Cengel Dr., Michael A. BolesPublisher:McGraw-Hill Education
- Control Systems EngineeringMechanical EngineeringISBN:9781118170519Author:Norman S. NisePublisher:WILEYMechanics of Materials (MindTap Course List)Mechanical EngineeringISBN:9781337093347Author:Barry J. Goodno, James M. GerePublisher:Cengage LearningEngineering Mechanics: StaticsMechanical EngineeringISBN:9781118807330Author:James L. Meriam, L. G. Kraige, J. N. BoltonPublisher:WILEY
Elements Of Electromagnetics
Mechanical Engineering
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Oxford University Press
Mechanics of Materials (10th Edition)
Mechanical Engineering
ISBN:9780134319650
Author:Russell C. Hibbeler
Publisher:PEARSON
Thermodynamics: An Engineering Approach
Mechanical Engineering
ISBN:9781259822674
Author:Yunus A. Cengel Dr., Michael A. Boles
Publisher:McGraw-Hill Education
Control Systems Engineering
Mechanical Engineering
ISBN:9781118170519
Author:Norman S. Nise
Publisher:WILEY
Mechanics of Materials (MindTap Course List)
Mechanical Engineering
ISBN:9781337093347
Author:Barry J. Goodno, James M. Gere
Publisher:Cengage Learning
Engineering Mechanics: Statics
Mechanical Engineering
ISBN:9781118807330
Author:James L. Meriam, L. G. Kraige, J. N. Bolton
Publisher:WILEY
Physics 33 - Fluid Statics (1 of 10) Pressure in a Fluid; Author: Michel van Biezen;https://www.youtube.com/watch?v=mzjlAla3H1Q;License: Standard YouTube License, CC-BY