Question

The siren of a fire engine is heard in situations A,B, and C. Rank the pitch heard, from greatest to least, when the fire engine is traveling

A- Toward the listener at 30 km/h
B- Toward the listener at 50 km/h
C- Away from listener at 20 km/h
????

Answer 1

Due to the doppler effect the correct rank of this effect is: B- toward the listener at 50 km/h then A- toward the listener at 30 km/h and then C- away from the listener at 20 km/h