Consider a boundary layer along a thin plate. This problem involves the following parameters such as boundary layer thickness delta, downstream distance x, free-stream velocity U, fluid density rho, fluid viscosity mu. The number of expected nondimensional parameters, pi subscript s of this problem is

Water vapor initially at 10 bar and 400 °c is contained within a piston-cylinder assembly. the water lost heat to the surrounding according to isochoric (iso-volumetric) process until its temperature is 150 °c. the water is then condensed isothermally to saturated liquid. for the water as a system, calculate the work in kj/kg