Q1. Consider steady heat transfer between two large parallel plates at constant temperatures of T1=290K and T2=150K that are L=2cm apart. Assuming the surfaces to be black (emissivity =1 ), detemine the rate of heat transfer between the plates per unit surface area assuming the gap between the plates is (a) Filled with atmospheric air (b) Evacuated (c) Filled with fiberglass insulation (d) Filled with superinsulation having an apparent thermal conductivity of 0.00015W/m.C. Q2. Consider a medium in which the heat conduction equation is given its simplest form as r1r(krrT)+z(kzT)+egen=0 (a) Is heat transfer steady or transient? (b) Is heat transfer one-, two- or three-dimensional? (c) Is there heat generation in the medium? (d) Is the thermal conductivity of the medium constant or variable? Q3. A spherical container of inner radius I1=2m, outer radius I1=2.1m, and