Different Substances Have Different Thermal Conductivities K, Which Measure How

Different substances have different thermal conductivities k, which measure how well heat is transferred by molecular collisions.  The heat flow rate per unit area H is defined by: where ΔT is the difference in temperature over a distance L.  The tiled part of a floor in a room feels colder than the carpeted part because:

A) the temperature of the tile is lower than the temperature of the carpet.
B) the thermal conductivity of the tile is higher than the thermal conductivity of the carpet.
C) the thermal conductivity of the tile is lower than the thermal conductivity of the carpet.
D) heat travels a greater distance through the carpet.

Correct Answer:

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