Consider the incompressible laminar flow over a flat plate of length 3 m at standard sea level conditions. the flow velocity is 100 m/s. for the laminar boundary layer, calculate:

(a) the boundary layer thickness at the downstream edge of the plate.
(b) the total skin friction drag coefficient.
(c) the drag per unit span.

An open feedwater heater operates at steady state with liquid entering at inlet 1 with t? = 40°c and pl = 1 .2 mpa. water vapor att2-200°c and p2 = 1.2 mpa enters at inlet 2. saturated liquid water exits with a pressure of pa 1.2 mpa. neglect heat transfer with the surroundings and all kinetic and potential energy effects, determine the mass flow rate of steam at inlet 2 if the mass flow rate of liquid water at inlet 1 is given as 2 kg/s.