Acarpenter builds an exterior house wall with a layer of wood 3.0 cm thick on the outside and a layer of styrofoam insulation 2.4 cm thick on the inside wall surface. the wood has k=0.080w/(m? k), and the styrofoam has k= 0.010 w/(m? k). the interior surface temperature is 20.0 ? c , and the exterior surface temperature is -13.0 ? c

a.)what is the temperature at the plane where the wood meets the styrofoam? celsius

b.)what is the rate of heat flow per square meter through this wall? /m^2

Explanation:

Given

thermal conductivity of wood

thermal conductivity of insulation

thickness of wood

thickness of insulation

we know heat Flow is given by

change in temperature

thickness

K=thermal conductivity

A=Area of cross-section

A is same

Suppose T is the temperature of Junction

as heat Flow is same thus

(b)Rate of heat flow

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