Consider two walls, A and B, with the same surface areas and the same temperature drops across
Question:
Consider two walls, A and B, with the same surface areas and the same temperature drops across their thicknesses. The ratio of thermal conductivities is kA/kB = 4 and the ratio of the wall thicknesses is LA/LB = 2. The ratio of heat transfer rates through the walls Q̇A/Q̇B is
(a) 0.5
(b) 1
(c) 2
(d) 4
(e) 8
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The rate of heat transfer through a wall is given by the formula Q k A ...View the full answer
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Related Book For 
Heat And Mass Transfer Fundamentals And Applications
ISBN: 9780073398181
5th Edition
Authors: Yunus Cengel, Afshin Ghajar
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