The Thermal Conductivity of a Certain Concrete Is 0

question 96

Multiple Choice

The thermal conductivity of a certain concrete is 0.80 W/m .K and the thermal conductivity of a certain wood is 0.10 W/m ∙ K.How thick would a solid concrete wall have to be in order to have the same rate of heat flow through it as an 8.0-cm thick wall made of solid wood? Both walls have the same surface area and the same temperature difference across their faces.

• A)53 cm
• B)64 cm
• C)71 cm
• D)85 cm

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