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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