7.26 Consider the incompressible airflow within the boundary layer over a flat plate as shown in Figure P7.5. The velocity profile is given by the equation u = U[2(y/h) - (y/h)2]i, where h is a function of x. For the specific value of x in this problem, the value of h is given as 8 mm. If U is 80 m/s and the plate has a width (into the paper) of 0.5 m, determine the mass flowrate of air into or out of the top surface of the control volume. U CS U X Figure P7.5 31 h = 8 mm