Student A says: “It is impossible to get a perfectly exact measurement because every measuring device is limited in how many decimal places it can measure accurately.” Student B says: “If I had better equipment I would be able to make accurate measurements.” Student C says: “You would be able to make accurate measurements if you knew how to do it properly. Let me do it.”

Acarpenter builds an exterior house wall with a layer of wood 2.9 cm thick on the outside and a layer of styrofoam insulation 2.3 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 19.0 ∘c , and the exterior surface temperature is -15.0 ∘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