air flows at 1.2 m/s along a flat surface when it encounters a jet of air issuing from the horizontal wall at point a, as in fio p8.16. the jet volume flow is 0.4 m/s per unit depth into the paper. if the jet is approximated as an inviscid line source, (a) locate the stagnation point s on the wall. (b) how far vertically will the jet flow extend into the stream?