A police car is sounding a siren with 1320 Hz on a 20°C day.
A. You are standing beside the road. What frequency do you hear as the police car approaches you at 109 km/hr? (include units with answer)
B. You are standing beside the road. What frequency do you hear after the police car passes you at 109 km/hr? (include units with answer)
C. You are driving down the road at 109 km/hr and the police man is sitting still. What frequency do you hear as you approach the siren? (include units with answer)
D. You are driving down the road at 109 km/hr and the police man is sitting still. What frequency do you hear after you pass thee siren? (include units with answer)
