Q4: Choose the correct answer: 1) A cylindrical rod with uniform thermal conductivity is subjected to radial heat conduction. The rod has an outer radius R1 and an inner radius R2. The temperature difference between the inner and outer surfaces is AT. In this scenario, what is the primary factor affecting the rate of heat conduction through the rod? A) Reynolds number B) Volumetric hydraulic bench E) Thermal conductivity D) Vacuum and gauge pressure C) Center of pressure 2) In the context of linear heat conduction, the term Fourier's Law is associated with: A) Reynolds number B) Vacuum pressure D) Linear heat conduction E) Center of pressure C) Radial heat conduction 3) The concept used to describe heat transfer in a direction perpendicular to the surface is: A) Radial heat conduction D) Vacuum pressure C) Linear heat conduction B) Reynolds number E) Volumetric hydraulic bench