Which statement is correct about a normal shock wave ?

Question

Question ATPL - Airline Transport Pilot license - Principles of Flight

QuizVDS · Accepted Answer

The airflow changes from supersonic to subsonic

QuizVDS · Answer

The airflow changes direction

QuizVDS · Answer

The airflow changes from subsonic to supersonic

QuizVDS · Answer

The airflow expands when passing the aerofoil

Id 322 - ATPL - Which statement is correct about a normal shock wave ?