Fundamentals of Thermal-Fluid Sciences
5th Edition
ISBN: 9780078027680
Author: Yunus A. Cengel Dr., Robert H. Turner, John M. Cimbala
Publisher: McGraw-Hill Education
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Chapter 21, Problem 36P
To determine
Define reflectivity and transmissivity properties. State the various forms of reflection.
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Homework: ANOVA Table for followed design
B
AB
Dr
-1
-1
1
(15.18,12)
1
-1
-1
(45.48.51)
-1
1
-1
(25,28,19)
1
1
(75.75,81)
20.
[Ans. 9; 71.8 mm]
A semi-elliptical laminated spring is made of 50 mm wide and 3 mm thick plates. The length between
the supports is 650 mm and the width of the band is 60 mm. The spring has two full length leaves and
five graduated leaves. If the spring carries a central load of 1600 N, find:
1. Maximum stress in full length and graduated leaves for an initial condition of no stress in the
leaves.
2. The maximum stress if the initial stress is provided to cause equal stress when loaded.
[Ans. 590 MPa ; 390 MPa ; 450 MPa ; 54 mm]
3. The deflection in parts (1) and (2).
Q6/ A helical square section spring is set inside another, the outer spring having a free
length of 35 mm greater than the inner spring. The dimensions of each spring are as
follows:
Mean diameter (mm)
Side of square section (mm)
Active turns
Outer
Inner
Spring
Spring
120
70
8
7
20
15
Determine the (1) Maximum deflection of the two springs and (2) Equivalent spring
rate of the two springs after sufficient load has been applied to deflect the outer
spring 60 mm. Use G = 83 GN/m².
Chapter 21 Solutions
Fundamentals of Thermal-Fluid Sciences
Ch. 21 - Prob. 1PCh. 21 - By what properties is an electromagnetic wave...Ch. 21 - What is thermal radiation? How does it differ from...Ch. 21 - Prob. 4PCh. 21 - Prob. 5PCh. 21 - Prob. 6PCh. 21 - Prob. 7PCh. 21 - Prob. 8PCh. 21 - Prob. 9PCh. 21 - Prob. 10P
Ch. 21 - A radio station is broadcasting radio waves at a...Ch. 21 - Prob. 12PCh. 21 - Prob. 13PCh. 21 - Prob. 14PCh. 21 - Prob. 15PCh. 21 - Define the total and spectral blackbody emissive...Ch. 21 - Prob. 17PCh. 21 - Prob. 18PCh. 21 - Prob. 19PCh. 21 - Prob. 20PCh. 21 - A small body is placed inside of a spherical...Ch. 21 - Prob. 23PCh. 21 - A thin vertical copper plate is subjected to a...Ch. 21 - Prob. 25PCh. 21 - Prob. 26PCh. 21 - The temperature of the filament of an incandescent...Ch. 21 - The temperature of the filament of an incandescent...Ch. 21 - Prob. 30PCh. 21 - Prob. 31PCh. 21 - Prob. 32PCh. 21 - Prob. 33PCh. 21 - Prob. 34PCh. 21 - Define the properties emissivity and absorptivity....Ch. 21 - Define the properties reflectivity and...Ch. 21 - Prob. 37PCh. 21 - Prob. 38PCh. 21 - A furnace that has a 40-cm × 40-cm glass window...Ch. 21 - Prob. 40PCh. 21 - The emissivity of a tungsten filament can be...Ch. 21 - Prob. 42PCh. 21 - Prob. 43PCh. 21 - Prob. 44PCh. 21 - Prob. 45PCh. 21 - Prob. 46PCh. 21 - An opaque horizontal plate is well insulated on...Ch. 21 - Prob. 48PCh. 21 - Prob. 49PCh. 21 - Prob. 50PCh. 21 - What does the view factor represent? When is the...Ch. 21 - How can you determine the view factor F12 when the...Ch. 21 - What are the summation rule and the superposition...Ch. 21 - Prob. 54PCh. 21 - Consider two coaxial parallel circular disks of...Ch. 21 - Consider two coaxial parallel circular disks of...Ch. 21 - Prob. 57PCh. 21 - Prob. 58PCh. 21 - Prob. 59PCh. 21 - Prob. 60PCh. 21 - Determine the four view factors associated with an...Ch. 21 - Prob. 62PCh. 21 - Prob. 63PCh. 21 - Prob. 64PCh. 21 - Prob. 65PCh. 21 - Prob. 66PCh. 21 - Determine the view factors F13 and F23 between the...Ch. 21 - Prob. 68PCh. 21 - Prob. 69PCh. 21 - Two infinitely long parallel plates of width w are...Ch. 21 - Prob. 71PCh. 21 - Prob. 72PCh. 21 - Prob. 73PCh. 21 - Why is the radiation analysis of enclosures that...Ch. 21 - Prob. 75PCh. 21 - Prob. 76PCh. 21 - Prob. 77PCh. 21 - What are the two methods used in radiation...Ch. 21 - Prob. 79PCh. 21 - Prob. 80PCh. 21 - Prob. 82PCh. 21 - Two black parallel rectangles with dimensions 3 ft...Ch. 21 - Prob. 84PCh. 21 - Prob. 85PCh. 21 - Prob. 86PCh. 21 - Prob. 87PCh. 21 - Prob. 88PCh. 21 - Consider a hemispherical furnace of diameter D = 5...Ch. 21 - A dryer is shaped like a long semicylindrical duct...Ch. 21 - Prob. 91PCh. 21 - Prob. 92PCh. 21 - Prob. 93PCh. 21 - Prob. 94PCh. 21 - Prob. 95PCh. 21 - Prob. 96PCh. 21 - Prob. 97PCh. 21 - Prob. 99PCh. 21 - Prob. 100PCh. 21 - Prob. 101PCh. 21 - Reconsider Prob. 21–101. Using an appropriate...Ch. 21 - Air is flowing between two infinitely large...Ch. 21 - Prob. 104PCh. 21 - Prob. 105PCh. 21 - Prob. 106PCh. 21 - Prob. 107PCh. 21 - Prob. 108PCh. 21 - Prob. 109PCh. 21 - Prob. 111PCh. 21 - Prob. 112PCh. 21 - Prob. 113PCh. 21 - Prob. 114PCh. 21 - A 1-m-diameter spherical cavity is maintained at a...Ch. 21 - Prob. 117RQCh. 21 - Prob. 118RQCh. 21 - Prob. 119RQCh. 21 - Prob. 120RQCh. 21 - Prob. 121RQCh. 21 - Prob. 122RQCh. 21 - Prob. 123RQCh. 21 - Prob. 124RQCh. 21 - Prob. 125RQCh. 21 - Consider an enclosure consisting of eight...Ch. 21 - Consider a cylindrical enclosure with A1, A2, and...Ch. 21 - Two parallel back disks are positioned coaxially...Ch. 21 - Two parallel concentric disks, 20 cm and 40 cm in...Ch. 21 - A dryer is shaped like a long semicylindrical duct...Ch. 21 - Prob. 131RQCh. 21 - Prob. 132RQCh. 21 - Prob. 133RQCh. 21 - Prob. 134RQCh. 21 - A 2-m-internal-diameter double-walled spherical...Ch. 21 - Prob. 136RQCh. 21 - Prob. 137RQCh. 21 - Prob. 138RQ
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