A concrete slab is 10.0 cm thick and has an area of 6.00 m2. Electric heating coils are installed under the slab to melt the ice on the surface in the winter months. What minimum power must be supplied to the coils to maintain a temperature difference of 21.0°C between the bottom of the slab and its surface? Assume all the energy transferred is through the slab, and the thermal conductivity of the concrete is 1.3 J/s · m · °C.

Question

A concrete slab is 10.0 cm thick and has an area of 6.00 m2. Electric heating coils are installed under the slab to melt the ice on the surface in the winter months. What minimum power must be supplied to the coils to maintain a temperature difference of 21.0°C between the bottom of the slab and its surface? Assume all the energy transferred is through the slab, and the thermal conductivity of the concrete is 1.3 J/s · m · °C.  

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Heat Transfer

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