1. (6 pts) Briefly explain what the Reynolds number represents for a given flow. 2. (6 pts) Briefly explain what the Prandtl number represents for a fluid. 3. (6 pts) Briefly explain what the Nusselt number represents for a given heat transfer process. 4. (12 pts) Fluid is flowing along a flat plate with uniform positive surface heat flux, resulting in the formation of hydrodynamic and thermal boundary layers. Sketch superimposed qualitative mean velocity profiles through the boundary layer thickness at Rex = 10,000, Rex = 100,000, and Rex = 1,000,000. On a second graph, sketch superimposed qualitative temperature profiles through the boundary layer thickness for the same three locations.