ine -5, 2018 Arnold work for fu d ther tm Quiz #1 Physics 7E Arnold Guerra III Listener & Save k=10m/s (f = Problem 4. (15 points) The siren of a fire truck that is traveling northward at 15.0 m/s emits a sound wave of frequency 3000 Hz. A car in front of the fire truck is also traveling northward at 10.0 m/s. The air outside is calm (not windy) and its temperature is zero degrees Celsius. What is the frequency of the siren's sound that the fire truck driver hears reflected back from the car in front of the truck? = 15m/s 3000 112 7 fr V&V ts V&Vs V= (33106CT) = 331 m/s