Find the thermal conductivity (in Wm^-1 K^-1) and thermal diffusivity (m^2s^-1) for a new insulating material for which the following information has been determined:
Test sample: .5 in. by 1 ft square
delta T across sample: 5 degrees F
Heat flow: 24 Btu in a 10 h test at steady-state
Sample density: 0.15g cm^-3
Sample heat capacity: 0.3 kcal kg^-1 K^-1