A police car whose siren has a natural frequency of 1,500 Hz . A stationary observer detects this sound. What frequency does the observer measure, if the police car is approaching her at a speed of 17 m/s? The speed of sound in air is 343 m/s. State your answer to the nearest Hz.

A bat is flying 5.10 m/s is chasing an insect flying in the same direction. The bat emits a 39.9 kHz chirp and receives back an echo at 40.6 kHz. What is the speed of the insect ?

Standing at a crosswalk, you hear a frequency of 520 Hz from the siren of an approaching ambulance. After the ambulance passes, the observed frequency of the siren is 436 Hz. Determine the ambulance's speed from these observations. (Take the speed of sound to be 343 m/s.) m/s

An ambulance with a siren emitting a frequency of 1600HZ overtakes and passes a cyclist pedaling a bike at 4 m/s. After being passed, the cyclist hears a frequency of 1590HZ. How fast is the ambulance moving? Temperature of air is 25°C. 2.

Standing at a crosswalk, you hear a frequency of 550 Hz from the siren of an approaching ambulance. After the ambulance passes, the observed frequency of the siren is 462 Hz. Determine the ambulance's speed from these observations. (Take the speed of sound to be 343 m/s.)

A train approaches a platform at a speed of 22 km/h while it blows its whistle. Someone on the platform hears the whistle at 342 Hz. Calculate the actual frequency of the whistle. (speed of sound = 343 m/s)

A train approaches a platform at a speed of 30 km/h while it blows its whistle. Someone on the platform hears the whistle at 275 Hz. Calculate the actual frequency of the whistle. (speed of sound = 343 m/s)

A baseball hits a car, breaking its window and triggering its alarm which sounds at a frequency of 1270 Hz. What frequency (in Hz) is heard by a boy on a bicycle riding away from the car at 7.95 m/s? Take the speed of sound to be 343 m/s

Standing at a crosswalk, you hear a frequency of 570 Hz from the siren of an approaching ambulance. After the ambulance passes, the observed frequency of the siren is 488 Hz. Determine the ambulance's speed from these observations. (Take the speed of sound to be 343 m/s.)

A stationary police car emits a sound of frequency 1200 HzHz that bounces off of a car on the highway and returns with a frequency of 1260 HzHz. The police car is right next to the highway, so the moving car is traveling directly toward or away from it. What frequency would the police car have received if it had been traveling toward the other car at 23.0 m/sm/s ?