Question

The top layer of a goose down sleeping bag has a thickness of 5.0 cm and a surface area of 1.0 m2. when the outside temperature is -20o c, a body loses 20 cal/hr by heat conduction through the bag (which remains 35o c inside). assuming that a person is sleeping on an insulated pad that prevent heat loss to the ground, find the thermal conductivity of the goose down.

Answer 1

the thermal conductivity of the goose down = 0.0000210w/mK

Step-by-step explanation:

The detailed steps from fourier's law of heat conduction is as shown in the attached file.