Air at 27 C and 1 atmflows over a flat plate at a speed of 2.5 m/sec. Calculate the boundarylayer thickness at distances of 20 and 40 cm from the leading edge of the plate. Assume unitdepth in the z direction. Now assume the plate is heated over its entire length to atemperature of 60 C. Calculate the heat transferred in a) the first 20 cm of the plate, and b)the first 40 cm of the plate.

Agas contained within a piston-cylinder assembly e end nation about same energy states, 1 and 2, where pi 10 bar, v undergoes two processes, a and b, between the sam 0.1 m3, ui-400 kj and p2 1 bar, v2 1.0 m2, u2 200 kj: process a: process from 1 to 2 during which the pressure- volume relation is pv constant process b: constant-volume process from state 1 to a pressure of 2 bar, followed by a linear pressure-volume process to +20 0 state 2 kinetic and potential energy effects can be ignored. for each of the processes a and b, (a) sketch the process on p-v coordinates, (b) evaluate the work, in kj, and (c) evaluate process the heat transfer, in kj