A mountain climber wears a goose down jacket 2.6cm thick with total surface area 0.95 m2. The temperature at the surface of the clothing is -15â??C and at the skin is 34â??C.
A). Determine the rate of heat flow by conduction through the jacket assuming it is dry and the thermal conductivity k is that of goose down.
B). Determine the rate of heat flow by conduction through the jacket assuming the jacket is wet, so k is that of water and the jacket has matted to 0.60cm thickness.