A room has one wall made of concrete, one wall made of copper, and one wall made of steel. All of the walls are the same size and at the same temperature of 20°C. Which wall feels coldest to the touch?

Question

anonymous · Answer

i think the concrete

anonymous · Answer

Well coolness is the sensation resulting from the rate of transfer of heat to another medium.  So this sensation would be increased if the object touched where to conduct heat away faster.  Metals are way better heat conductors than concrete and copper is 9X better conductor than steel.  So copper would seem coolest.  Also think of air blowing on your skin, it feels cooler when the speed is higher because it is removing heat fast than when it is still. think wind chill factor or "real feel" in weather reports