Table 14.6 lists the thermal conductivities of several substances. Give qualitative argu...

Table 14.6 lists the thermal conductivities of several substances. Give qualitative arguments to explain the following questions. (a) Why is the thermal conductivity of goose down about the same as the thermal conductivity of air? (b) Goose down is very effective for making winter coats. Explain why goose down must be kept dry to be effective. Can you predict the value of the thermal conductivity when it is soaked with water?

(reference table 14.6)