A granite wall has a thickness of 78.5 cm, an area of 6.15 m by 2.73 m and a thermal conductivity of 2.1 W/(m C°). The temperature on one face of the wall is 3.93°C and 25.4°C on the opposite face. How much heat is transferred in one minute through the granite wall?

A granite wall has a thickness of .50 m and a thermal conductivity of 2.1. The temperate on one face of the wall is 5.2 and 20.0 on the opposite face. How much heat is transferred in one hour through one square meter of the granite wall?

Consider a large plane wall of thickness , thermal conductivity , and surface area . The left side of the wall is maintained at a constant temperature of while the right side loses heat by convection to the surrounding air at with a heat transfer coefficient of . Assuming constant thermal conductivity and no heat generation in the wall. Evaluate the rate of heat transfer through the wall.

A glass windowpane in a home is 0.620 cm thick and has dimensionsof 1.17 m 1.60 m. On a certain day, the temperature of the interiorsurface of the glass is 21.0°C and the outdoor temperature is 0°C.Assume the thermal conductivity of the glass is 0.8 W/m · °C.
(a) What is the rate at which energy is transferred by heat throughthe glass?


(b) How much energy is transferred through the window in one day,assuming the temperatures on the surfaces remain constant?