Consider a wall that consists of two layers, A and B, with the following values: kA = 0.8 W/m⋅ºC, LA = 8 cm, kB = 0.2 W/m⋅ºC, LB = 5 cm. If the temperature drop across the wall is 18ºC, the rate of heat transfer through the wall per unit area of the wall is a. 89.6 W/m2 b. 72.0 W/m2 c. 153 W/m2 d. 51.4 W/m2 e. 180 W/m2

Consider a wall that consists of two layers, A and B, with the following values: kA = 0.8 W/m⋅ºC, LA = 8 cm, kB = 0.2 W/m⋅ºC, LB = 5 cm. If the temperature drop across the wall is 18ºC, the rate of heat transfer through the wall per unit area of the wall is a. 89.6 W/m2 b. 72.0 W/m2 c. 153 W/m2 d. 51.4 W/m2 e. 180 W/m2

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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Question

Consider a wall that consists of two layers, A and B, with the following values: k_A= 0.8 W/m⋅ºC, L_A= 8 cm, k_B= 0.2 W/m⋅ºC, L_B= 5 cm. If the temperature drop across the wall is 18ºC, the rate of heat transfer through the wall per unit area of the wall is

89.6 W/m²

72.0 W/m²

153 W/m²

51.4 W/m²

180 W/m²

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