1. The problem statement, all variables and given/known data P15. The police car with its 300 Hz siren is moving toward a warehouse at 30 m/s, intending to crash through the door. What frequency does the driver of the police car hear reflected from the warehouse? (5 marks) 2. Relevant equations doppler shift for an approaching source. (f+) = fo / [1-vs/v] 3. The attempt at a solution the doppler shift of the siren at the door is (300Hz)/ (1- [(30m/s)/(343m/s)]) =328.75Hz now assume that the warehouse/ warehouse door reflects 100% of the incident waves. I really have no idea where to go from here.