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 1, Problem 1.31P
A spherical communications satellite, 2 m in diameter, is placed in orbit around the earth. The satellite generates 1000 W of internal power from a small nuclear generator. If the surface of the satellite has an emittance of 0.3, and is shaded from solar radiation by the earth, estimate its surface temperature.
Expert Solution & Answer
Trending nowThis is a popular solution!
Students have asked these similar questions
The two disks A and B have a mass of 4 kg and 6 kg,
respectively. They collide with the initial velocities shown. The
coefficient of restitution is e = 0.75. Suppose that
(VA)1 = 6 m/s, (VB)₁ = 7 m/s. (Figure 1)
Determine the magnitude of the velocity of A just after impact.
Determine the angle between the x axis and the velocity of A just after impact, measured clockwise from the negative x axis.
Determine the magnitude of the velocity of B just after impact.
Determine the angle between the x axis and the velocity of B just after impact, measured clockwise from the positive x axis.
(VB)1
B
(VA)1
60°
Line of impact
A hot plane surface is maintained at 100°C, and it is exposed to air at 25°C.The combined heat transfer coefficient between the surface and the air is 25W/m²·K. (same as above). In this task, you are asked to design fins to cool asurface by attaching 3 cm-long, 0.25 cm-diameter aluminum pin fins (thermalconductivity, k = 237 W/m·K) with a center-to-center distance of 0.6 cm. (Tip:do not correct the length). Determine the rate of heat transfer from thefinned structure to the air for a 1 m x 1 m section of the plate.
Heat is generated uniformly in a 4 cm-diameter, 16-cm long solid bar (k=2.4 W/m-K). The temperaturesat the center and at the surface of the bar are measured to be 210 oC and 45 oC, respectively. Calculatethe rate of heat generation within the bar. Solve the relevant energy balance equation and the boundaryconditions to calculate the rate of heat generation within the bar. (6 pts)
Chapter 1 Solutions
Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)
Ch. 1 - 1.1 On a cold winter day, the outer surface of a...Ch. 1 - 1.2 The weight of the insulation in a spacecraft...Ch. 1 - 1.3 A furnace wall is to be constructed of brick...Ch. 1 - 1.4 To measure thermal conductivity, two similar...Ch. 1 - To determine the thermal conductivity of a...Ch. 1 - A square silicon chip 7mm7mm in size and 0.5-mm...Ch. 1 - A cooling system is to be designed for a food...Ch. 1 - 1.80 Describe and compare the modes of heat loss...Ch. 1 - Heat is transferred at a rate of 0.1 kW through...Ch. 1 - 1.10 A heat flux meter at the outer (cold) wall of...
Ch. 1 - 1.11 Calculate the heat loss through a glass...Ch. 1 - 1.12 A wall with a thickness is made of a...Ch. 1 - 1.13 If the outer air temperature in Problem is...Ch. 1 - Using Table 1.4 as a guide, prepare a similar...Ch. 1 - 1.15 A thermocouple (0.8-mm-diameter wire) used to...Ch. 1 - Water at a temperature of 77C is to be evaporated...Ch. 1 - The heat transfer rate from hot air by convection...Ch. 1 - The heat transfer coefficient for a gas flowing...Ch. 1 - 1.19 A cryogenic fluid is stored in a...Ch. 1 - A high-speed computer is located in a...Ch. 1 - 1.21 In an experimental set up in a laboratory, a...Ch. 1 - 1.22 In order to prevent frostbite to skiers on...Ch. 1 - Using the information in Problem 1.22, estimate...Ch. 1 - Two large parallel plates with surface conditions...Ch. 1 - 1.25 A spherical vessel, 0.3 m in diameter, is...Ch. 1 - 1.26 Repeat Problem 1.25 but assume that the...Ch. 1 - Determine the rate of radiant heat emission in...Ch. 1 - 1.28 The sun has a radius of and approximates a...Ch. 1 - 1.29 A spherical interplanetary probe with a 30-cm...Ch. 1 - A spherical communications satellite, 2 m in...Ch. 1 - A long wire 0.7 mm in diameter with an emissivity...Ch. 1 - Wearing layers of clothing in cold weather is...Ch. 1 - A section of a composite wall with the dimensions...Ch. 1 - A section of a composite wall with the dimensions...Ch. 1 - Repeat Problem 1.35 but assume that instead of...Ch. 1 - 1.37 Mild steel nails were driven through a solid...Ch. 1 - Prob. 1.38PCh. 1 - 1.39 On a cold winter day, the outside wall of a...Ch. 1 - As a designer working for a major electric...Ch. 1 - 1.41 A heat exchanger wall consists of a copper...Ch. 1 - 1.43 A simple solar heater consists of a flat...Ch. 1 - A composite refrigerator wall is composed of 5 cm...Ch. 1 - An electronic device that internally generates 600...Ch. 1 - 1.47 A flat roof is modeled as a flat plate...Ch. 1 - A horizontal, 3-mm-thick flat-copper plate, 1-m...Ch. 1 - 1.49 A small oven with a surface area of is...Ch. 1 - A steam pipe 200 mm in diameter passes through a...Ch. 1 - 1.51 The inner wall of a rocket motor combustion...Ch. 1 - 1.52 A flat roof of a house absorbs a solar...Ch. 1 - Determine the power requirement of a soldering...Ch. 1 - 1.54 The soldering iron tip in Problem 1.53...Ch. 1 - Prob. 1.55PCh. 1 - A pipe carrying superheated steam in a basement at...Ch. 1 - Draw the thermal circuit for heat transfer through...Ch. 1 - 1.60 Two electric resistance heaters with a 20 cm...Ch. 1 - 1.63 Liquid oxygen (LOX) for the space shuttle is...Ch. 1 - The interior wall of a large, commercial walk-in...Ch. 1 - 1.67 In beauty salons and in homes, a ubiquitous...Ch. 1 - The heat transfer coefficient between a surface...Ch. 1 - The thermal conductivity of fibreglass insulation...Ch. 1 - 1.71 The thermal conductivity of silver at 212°F...Ch. 1 - 1.72 An ice chest (see sketch) is to constructed...Ch. 1 - Estimate the R-values for a 5-cm-thick fiberglass...Ch. 1 - A manufacturer in the United States wants to sell...Ch. 1 - Referring to Problem 1.74, how many kilograms of...Ch. 1 - 1.76 Explain a fundamental characteristic that...Ch. 1 - 1.77 Explain each in your own words. (a) What is...Ch. 1 - What are the important modes of heat transfer for...Ch. 1 - 1.79 Consider the cooling of (a) a personal...Ch. 1 - Describe and compare the modes of heat loss...Ch. 1 - A person wearing a heavy parka is standing in a...Ch. 1 - Discuss the modes of heat transfer that determine...
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
- A hot plane surface is maintained at 100°C, and it is exposed to air at 25°C. The combined heat transfercoefficient between the surface and the air is 25 W/m²·K. You are tasked with designing an insulatingmaterial to cover the surface in order to reduce the heat transfer rate by 90%, meaning only 10% of theheat transfer would occur compared to the situation without insulation. The available insulating materialhas a thermal conductivity of 0.093 W/m·K. Assuming that the heat transfer coefficient and the surface/airtemperatures remain constant, calculate the required thickness of the insulating material in centimeters.arrow_forwardThe euler parameter in the image describes the orientation of N in the reference frame of U. How do I find the euler parameters that describe the orientation of U in the reference frame of N from the given information in the image.arrow_forwardFpull Ө A person, weighing 155 lb, is being lifted by a rope thrown. over a tree branch as shown (drawing not to scale). If the static coefficient of friction between the rope and the tree branch is us = 0.67, and the 0 = 45°. Determine the pulling force required to start lifting the person and the pulling force required to keep the person from falling? Pulling force to lift the person: Pulling force to keep the person from falling: lb lbarrow_forward
- The car weighs 1630 lbs and drives up the hill at a constant speed. Assuming the static friction coefficient between the wheels and the road is μs = 0.64, determine the steepest angle that the car can climb without slipping if it is.... a.) rear wheel drive b.) front wheel drive c.) four wheel drive a C CC ①⑧ BY NC Dr. Jacob Moore Values for dimensions on the figure are given in the following table. Note the figure may not be to scale. Variable Value a 8.75 ft b 3.325 ft C 1.66 ft a.) The steepest angle for rear wheel drive is 0 max degrees. b.) The steepest angle for front wheel drive is Omax degrees. c.) The steepest angle for four wheel drive is Omax degrees. = = =arrow_forwardFor the structure below, each member of the truss will safely support a tensile force of 3 kN and a compressive force of 1 kN. Determine the largest mass m that can be safely suspended. Hint: First work through this algebraically to find the forces in each member terms of the mass "m" to determine the largest stress member. 1 m t 1 m 1 m 1m + 1m E B 1977 marrow_forwardBlock A has a mass of 34 kg and block B has a mass of 41 kg. The two blocks are stacked on the ramp with an incline of Ꮎ 0 = 15.4°. Determine the largest horizontal force F that can be applied to block B without either block moving for each of the following two cases: a.) The friction coefficient for the contact between blocks A and B is μs1 0.56 and the friction coefficient for the = contact between block A and the ramp is μs2 = 0.34. b.) The friction coefficient for the contact between blocks A and B is 1 = 0.56 and the friction coefficient for the contact between block A and the ramp is μs2 = 0.17. Ꮎ F B A Part a) The limiting slip condition occurs at Select an answer CC BY NC SA 2016 Eric Davishahl The maximum force before either block A or B slips is N Part b) The limiting slip condition occurs at Select an answer The maximum force before either block A or B slips is Narrow_forward
- The crane truck has a weight of 11000 lb and a center of gravity at point . The parking brake only locks the rear wheels of the truck, so the front wheels are free to rotate. Determine the maximum force F applied at the angle = 0 30.5° that can be exerted on the crane without it slipping or tipping for each of the following cases: Case 1: The static friction coefficient between the rear tires and the ground is μ. = 0.050. ა Case 2: The static friction coefficient between the rear tires and the ground is μα == 0.33. d CGD 口 BY NC SA F 2013 Michael Swanbom кажо с Values for dimensions on the figure are given in the following table. Note the figure may not be to scale. Variable Value a 5.5 ft b 9 ft C 4 ft 3 ft 10 ft d h For Case 1, the constraint is Select an answer F = lbs. шал For Case 2, the constraint is Select an answer F пал lbs. and andarrow_forwardYou are leaning your 5.0 ft, 15.0 lb ladder against the wall in your garage. There are 2 rubber foot paddles on the bottom of the ladder, and your garage floor is concrete. The static friction between the rubber and concrete is μs = 0.580. What is the maximum distance from the wall to the rubber foot paddles, which you can lean your ladder without it slipping? Assume the wall is smooth. S The maximum distance = ftarrow_forwardInstructions. "I have written solutions in text form, but I need experts to rewrite them in handwriting from A to Z, exactly as I have written, without any changes."arrow_forward
- Pearson eText Study Area mylabmastering.pearson.com Access Pearson P Pearson MyLab and Mastering Problem 14.78 P Course Home b Answered: HW_02.pdf EE 213-01 > Assignments HW_#... 2 of 8 Document Sharing User Settings The spring has a stiffness k = 200 N/m and an unstretched length of 0.5 m. It is attached to the 4.6-kg smooth collar and the collar is released from rest at A. Neglect the size of the collar. (Figure 1) Part A Determine the speed of the collar when it reaches B. Express your answer to three significant figures and include the appropriate units. Figure 1 of 1 με VB = Value Units Submit Request Answer Provide Feedback ? Review Next >arrow_forwardPearson eText Study Area Access Pearson mylabmastering.pearson.com P Pearson MyLab and Mastering Problem 15.79 P Course Home b Answered: HW_02.pdf EE 213-01 > Assignments HW_#... 6 of 8 > Document Sharing User Settings The two disks A and B have a mass of 4 kg and 5 kg, respectively. They collide with the initial velocities shown. The coefficient of restitution is e = 0.65. Suppose that (VA)1 = 6 m/s, (VB)1 = 8 m/s. (Figure 1) Part A Determine the magnitude of the velocity of A just after impact. Express your answer to three significant figures and include the appropriate units. Figure 1 of 1 μÅ (VA)2 = Value Units Submit Request Answer Part B ? Review Determine the angle between the x axis and the velocity of A just after impact, measured clockwise from the negative x axis. Express your answer in degrees to three significant figures. ΕΠΙ ΑΣΦ vec 01 Submit Request Answer Part C ? Determine the magnitude of the velocity of B just after impact. Express your answer to three significant…arrow_forwardPearson eText Study Area mylabmastering.pearson.com Access Pearson P Pearson MyLab and Mastering Problem 14.78 P Course Home b Answered: HW_02.pdf EE 213-01 > Assignments HW_#... 2 of 8 Document Sharing User Settings The spring has a stiffness k = 200 N/m and an unstretched length of 0.5 m. It is attached to the 4.6-kg smooth collar and the collar is released from rest at A. Neglect the size of the collar. (Figure 1) Part A Determine the speed of the collar when it reaches B. Express your answer to three significant figures and include the appropriate units. Figure 1 of 1 με VB = Value Units Submit Request Answer Provide Feedback ? Review Next >arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Principles of Heat Transfer (Activate Learning wi...Mechanical EngineeringISBN:9781305387102Author:Kreith, Frank; Manglik, Raj M.Publisher:Cengage Learning
Principles of Heat Transfer (Activate Learning wi...
Mechanical Engineering
ISBN:9781305387102
Author:Kreith, Frank; Manglik, Raj M.
Publisher:Cengage Learning
Understanding Thermal Radiation; Author: The Efficient Engineer;https://www.youtube.com/watch?v=FDmYCI_xYlA;License: Standard youtube license