Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)
8th Edition
ISBN: 9781305387102
Author: Kreith, Frank; Manglik, Raj M.
Publisher: Cengage Learning
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Textbook Question
Chapter 5, Problem 5.2P
Evaluate the Prandtl number from the following data:
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
The specific heat of copper is 0.093 cal/(g.°C) and the specific heat of gold is 0.031 cal/(g.°C). If 9.5 cal is supplied to one gram of copper and one gram of gold, the RATIO of temperature increase of gold to that of copper is:
The data listed below is from a passenger hot air balloon. The balloon is designed to lift 10-people (80 kg each person). The balloon consists of a basket, a burner- propane tank system. It will lift up when the cold air trapped inside warms up by the burner. Density of air inside the balloon is 99°C: 0.9486 kg/m³, density of air outside balloon is 20°C (ambient): 1.2041 kg/m³
Mass (kg)
Balloon
Basket
Burner
Propane tank
113.4 kg
63.5 kg
22.7 kg
183.7 kg
Assume the balloon is a sphere shape, volume =(4/3)pi R3.
a. Determine the minimum diameter of the balloon that would have a total lifting force to balance the weight of balloon, basket, burner, propane tank and 10 people?
b. If the balloon is converted to survey the weather, it will be filled with hydrogen gas (H2). Assume the weight of the people (800kg) is now replaced by onboard equipment, what is minimum diameter needed to keep it afloat at 18km above the surface of the earth?
A graduate student wants to use van der Waals' equation to express the pressure-volume-
temperature relations for a gas. Her project requires a reasonable degree of precision in
the p-V-T calculations. Therefore, she made the following experimental measurements with
her setup to get an idea of how easy the experiment would be:
Temperature, K
Pressure, atm
Volume, ft'/lb mol
273.1
273.1
200
1.860
1000
0.741
Determine values of constants a and b to be used in van der Waals' equation that best fit
the experimental data.
Chapter 5 Solutions
Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)
Ch. 5 - Evaluate the Reynolds number for flow over a tube...Ch. 5 - 5.2 Evaluate the Prandtl number from the following...Ch. 5 - Evaluate the Nusselt number for flow over a sphere...Ch. 5 - 5.4 Evaluate the Stanton number for flow over a...Ch. 5 - Evaluate the dimensionless groups hcD/k,UD/, and...Ch. 5 - 5.6 A fluid flows at 5 over a wide, flat plate 15...Ch. 5 - 5.7 The average Reynolds number for air passing in...Ch. 5 - Prob. 5.8PCh. 5 - When a sphere falls freely through a homogeneous...Ch. 5 - 5.10 Experiments have been performed on the...
Ch. 5 - 5.13 The torque due to the frictional resistance...Ch. 5 - The drag on an airplane wing in flight is known to...Ch. 5 - 5.19 Suppose that the graph below shows measured...Ch. 5 - Engine oil at 100C flows over and parallel to a...Ch. 5 - For flow over a slightly curved isothermal...Ch. 5 - Air at 20C flows at 1 m/s between two parallel...Ch. 5 - Air at 1000C flows at an inlet velocity of 2 m/s...Ch. 5 -
5.43 A refrigeration truck is traveling at 130...Ch. 5 - The air-conditioning system in a Chevrolet van for...Ch. 5 - Determine the rate of heat loss from the wall of a...
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
- 1: 18 PM | 19.0KB/ 65 BME ASsignment 2 .pdf Sr. Assignment Questions Bloom's No taxonomy level What is the physical significance of gas constant? Write about combined gas law, Gas constant and non-flow process? Prove that Cp-Cy=R with usual notation. 1 R 2 R 3 U 4 Represent the following compression process on p-v diagram with the same initial R condition (1) constant volume (2) constant pressure (3) Isothermal (4) adiabatic Differentiate isothermal process and adiabatic process. Show that change in internal energy AU = m Cv (T2-T1) for perfect gas. 5 R A 7 Prove that dryness fraction + wetness fraction= 1 R What is dryness fraction? Explain throttling calorimeter A sample of gas occupies 24.0 m³ at100.0K.Determineitsvolume at 200.0K 10 | 1kg of air at a 9 bar pressure and 80 °c temperature undergoes a non-flow work Polytropic process. The law of expansion in pV1l=C. the pressure falls to 1.4 bar during process. Calculate (1) final temp. (2) Work done (3) change in internal energy (4)…arrow_forwardQ = m xc x AT The iron block had a mass of 2 kg. Calculate the energy transferred by the heater to increase the temperature of the iron block by 5 °C. The specific heat capacity of iron is 450 J/ kg °C. SHOW YOUR WORKINGS OUTarrow_forwardDetermined the change in internal energy if there are 2kg of gas inside a rigid container, for which R=240J/kg-K (k=1.50), initial pressure P1= 500.16kPa and temperature and T1 = 70C, then pressure increase to 1675kPa.arrow_forward
- A vessel of capacity 7.5 m3 contains the mass of 8 kg of Oxygen gas at a pressure of 180000 N/m2 and a temperature of 338 K. Find the gas constant of Oxygen gas in J/kgK. Gas constant, (J/kgK) =arrow_forwardFor a certain ideal gas R = 25.8 ft.lb /lb °R and k =1.09a. What are the values of cp and cv?b. What mass of this gas would occupy a volume of 15 cu ft at 75 psia and 80 °F?c. If 30 Btu are transferred to this gas at constant volume in (b), what are the resultingtemperature and pressure? include the diagramarrow_forwardW m-°C. 1.)A 2mx2m aluminum sheet (240 is 5mm thick and used to separate two types of gas (1.1) and (55) in an experimental chamber. The 1st type of gas is maintained at 20℃ while the 2nd gas is at -20C. Solve for the rate of heat transfer in kW.arrow_forward
- The data below is from a passenger hot air balloon. The balloon is designed to lift 10-people (80 kg each person). The balloon consists of a basket, a burner- propane tank system. It will lift up when the cold air trapped inside warms up by the burner. Density of air inside the balloon is 99°C: 0.9486 kg/m³, density of air outside balloon is 20°C (ambient): 1.2041 kg/m³, Assume the balloon is a sphere shape, volume =(4/3)pi R3 Mass (kg) Balloon Basket Burner Propane tank 113.4 kg 63.5 kg 22.7 kg 183.7 kg a) Determine the minimum diameter of the balloon that would have a total lifting force to balance the weight of balloon, basket, burner, propane tank and 10 people? b) If the balloon is converted to survey the weather, it will be filled with hydrogen gas (H2). Assume the weight of the people (800kg) is now replaced by onboard equipment, what is minimum diameter needed to keep it afloat at 18km above the surface of the earth?arrow_forwardFor a gas of volumes Vi = 9.50 10-4 m3 and Vf = 1.40 10-4 m3 and pressures Pi = 2.00 106 Pa and Pf = 2.05 107 Pa, answer the following.For an isobaric process at Pi, find the internal energy change of the gas during this process.For an isovolumetric process at Vi, find the internal energy change of the gas during this process.arrow_forwardAn perfect gas of a specific composition Molar weight is 25 grams per mole and specific heat is 3 grams per mole. Y is initially at 200kPa and 2m3 in volume. Heat transmission resulted in a twofold increase in volume. Calculate how much heat was transferred if it was subjected to a process defined by 'n=1', "n=Cp/Cv," or "n=2."arrow_forward
- Unit weight of liquids Derive the formula used in determining the unit weight or density of a liquid using the displacement method. How is it different from the direct method? What are the practical applications of experiment?arrow_forwardThe mass (m)of a substance is equal to (Take M-molar mass & N- number of moles) M/N O M+N MN O M-N Which of the following relation is correct? du=Tds – pdv dh=Tds - pdv du=Tds + vdp dh=Tds / vdparrow_forward3:30 PM OA TOI d ME 3.6KB/s A docs.google.com/forms/d/e O Two blocks of masses 1 kg and 2 kg are pulled by two forces F1 = 1N and F2 = 4N over a frictionless table as shown in in the figure. What should be the minimum coefficient of friction between the blocks so that the blocks will move together? Assume g = 10m/s^2 1 kg 2 kg No trion 1/3 2/30 O 1/2 7/30 Next Clear formarrow_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 Press
Mechanics of Materials (10th Edition)Mechanical EngineeringISBN:9780134319650Author:Russell C. HibbelerPublisher:PEARSON
Thermodynamics: An Engineering ApproachMechanical EngineeringISBN:9781259822674Author:Yunus A. Cengel Dr., Michael A. BolesPublisher:McGraw-Hill Education
Control Systems EngineeringMechanical EngineeringISBN:9781118170519Author:Norman S. NisePublisher:WILEY
Mechanics of Materials (MindTap Course List)Mechanical EngineeringISBN:9781337093347Author:Barry J. Goodno, James M. GerePublisher:Cengage Learning
Engineering 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
First Law of Thermodynamics, Basic Introduction - Internal Energy, Heat and Work - Chemistry; Author: The Organic Chemistry Tutor;https://www.youtube.com/watch?v=NyOYW07-L5g;License: Standard youtube license