Estimate the rate of heat conduction through a 2.0-inthick
Chapter , Problem 21(choose chapter or problem)
Estimate the rate of heat conduction through a 2.0-inthick wooden door during a cold winter day in Minnesota. Include the brass doorknob. What is the ratio of the heat that escapes through the doorknob to the heat that escapes through the whole door? What is the total overall R-factor for the door, including the knob? The thermal conductivity of brass is
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