Problem A

If heat transfer by conduction through a solid medium occurs under $$steady$-$state$$ conditions, will the

temperature at any particular instant vary with location in the medium?

Problem B

What role does thermal conductivity play in the rate of heat transfer through a material? As a way of

explaining your result, consider a plane wall made of a solid material. Have two different temperatures exist

on opposite sides of the wall. For the same cross$-$sectional area, what happens to the rate of heat transfer

through the wall if the thermal conductivity is lowered?

Problem C

What might cause differences between values of thermal conductivity for materials $($e$.$g$.,$ copper versus

glass versus foam$)?$ For a fixed material, what might drive thermal conductivity changes?