8 mm thick sheets of metal (cp = 750 J/kgK and p = 5250 kg/m³) leave an oven at 1500 K and have the following distribution for spectral, hemispherical emissivity: 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 2 (um) Conduction, convection, and radiation from the surroundings can be neglected. Assume that the only mode of heat transfer is emission to the surroundings at 0 K. 5.2. What is the magnitude of the initial time rate of change of the temperature of the sheet? elect one: O a. 1.0172 K/s O b. 2.3018 K/s O c. 5.9460 K/s O d. 2.872 K/s O e. 3.5695 K/s O f. 7.9053 K/s O g. 10.1481 K/s
8 mm thick sheets of metal (cp = 750 J/kgK and p = 5250 kg/m³) leave an oven at 1500 K and have the following distribution for spectral, hemispherical emissivity: 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 2 (um) Conduction, convection, and radiation from the surroundings can be neglected. Assume that the only mode of heat transfer is emission to the surroundings at 0 K. 5.2. What is the magnitude of the initial time rate of change of the temperature of the sheet? elect one: O a. 1.0172 K/s O b. 2.3018 K/s O c. 5.9460 K/s O d. 2.872 K/s O e. 3.5695 K/s O f. 7.9053 K/s O g. 10.1481 K/s
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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Transcribed Image Text:8 mm thick sheets of metal (cp = 750 J/kgK and p = 5250 kg/m³) leave an oven at 1500 K and have the
following distribution for spectral, hemispherical emissivity:
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
2 (um)
Conduction, convection, and radiation from the surroundings can be neglected. Assume that the only
mode of heat transfer is emission to the surroundings at 0 K.
5.2. What is the magnitude of the initial time rate of change of the temperature of the sheet?
Select one:
O a. 1.0172 K/s
O b. 2.3018 K/s
Oc. 5.9460 K/s
O d. 2.872 K/s
O e. 3.5695 K/s
O f. 7.9053 K/s
O g. 10.1481 K/s
O h. 8.2245 K/s
O i. None of these
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