Consider air flowing past a hemisphere resting on a flat surface, as shown in Fig. P3.49 . Neglecting the effects of viscosity, if the internal pressure is pi , find an expression for the pressure...

Consider air flowing past a hemisphere resting on a flat surface, as shown in Fig. P3.49 . Neglecting the effects of viscosity, if the internal pressure is pi , find an expression for the pressure force on the hemisphere. At what angular location should a hole be cut in the surface of the hemisphere so that the net pressure force will be zero?