An exterior wall of a house may be approximated by a 4-in layer of common brick [k =0.7 W/m · ◦C] followed by a 1.5-in layer of gypsum plaster [k = 0.48 W/m · ◦C]. What thickness of loosely packed rock-wool insulation [k = 0.065 W/m · ◦C] should be added to reduce the heat loss (or gain) through the wall by 80 percent?
An exterior wall of a house may be approximated by a 4-in layer of common brick [k =0.7 W/m · ◦C] followed by a 1.5-in layer of gypsum plaster [k = 0.48 W/m · ◦C]. What thickness of loosely packed rock-wool insulation [k = 0.065 W/m · ◦C] should be added to reduce the heat loss (or gain) through the wall by 80 percent?
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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An exterior wall of a house may be approximated by a 4-in layer of common brick [k =0.7 W/m · ◦C] followed by a 1.5-in layer of gypsum plaster [k = 0.48 W/m · ◦C]. What thickness of loosely packed rock-wool insulation [k = 0.065 W/m · ◦C] should be added to reduce the heat loss (or gain) through the wall by 80 percent?
![Lec. (2)
Heat Transfer
Dr. Omar M. Ali
EXAMPLE 8 An exterior wall of a house may be approximated by a 4-in layer of common
%3D
brick [k =0.7 W/m Cl followed by a 1.5-in layer of gypsum plaster lk = 0.48 W/m •C]. What](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F5f0f5787-d97e-4af7-aa22-e8de48ec758d%2Fad4ee2f1-8c97-4870-a151-0267dfcf5bff%2Foee7jee_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Lec. (2)
Heat Transfer
Dr. Omar M. Ali
EXAMPLE 8 An exterior wall of a house may be approximated by a 4-in layer of common
%3D
brick [k =0.7 W/m Cl followed by a 1.5-in layer of gypsum plaster lk = 0.48 W/m •C]. What
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