30 Normal Shock Waves Recall Distance along nozzle ●Complete isentropic solution is impossiblefor some boundary conditions ( ???), i.e; for some Pbvalues ???. ●If Solutions are to be found, a newPHENOMENONmust be introduced; Discontinuity??Shock Wave??●It has been observed and seen that at SUPERSONIC speeds, very rapid changes in the properties of the flow may occur, mainly: Pressure Velocity Shock Wave 0PP0*PP?????