The siren is moving away from the listener with a speed of 45 m/s relativeto the air, and the listener is moving toward the siren with a speedof 15 m/s relative to the air. What frequency does the listener hear?

At rest, a car’s horn sounds at a frequency of 550Hz. When the horn is sounded, while the car is moving down a street, a bicyclist moving at 8.50m/s in the direction opposite to the car hears a frequency of 575Hz. (a) What is the speed of the car? (b) If the cyclist slows down to 2.50m/s before passing the car, what is the new frequency detected by the cyclist? Assume that the car moves with the same speed, and that the speed of sound in air is 343m/s.

(a) What frequency is received by a person watching an oncoming ambulance moving at 105 km/h and emitting a steady 713 Hz sound from its siren? The speed of sound on this day is 345 m/s. (b) What frequency does she receive after the ambulance has passed?

A student in the front row at a Grateful Dead concert is 8 meters away from the speaker. He hears the sound intensity at 5 W/m2. What will be the intensity level in dB if the student walks 800 m away from the speaker?

The record for the world's loudest burp is 109.9 dB, measured at a distance of 2.5 m from the burper. Assuming that this sound was emitted as a spherical wave, what was the power emitted by the burper during his record burp?

Answer Please

an ambulance is approaching you at 22 m/s, sounding its siren at a frequency of 675 Hz? If the speed of sound is 344 m/s , what  frequency do you observe? Your velocity is 0 m/s.

A ship mapping the depth of the ocean emits a sound of 37 kHz. The sound travels to the ocean floor and returns 0.65 s later. (a) How deep is the water at that location? (b) What is the wavelength of the wave in water? (c) What is the wavelength of the reflected wave as it travels into the air, where the speed of sound is 350 m/s?

A fire truck moving at 60 m/s sounds its siren whose frequency is 1320 Hz. A car is moving in the same direction as the ambulance at 30 m/s. What frequency does a person in the car hear (a) as the ambulance approaches the car? (b) After the ambulance passes the car?

(a) What frequency is received by a person watching an oncoming ambulance moving at 105 km/h and emitting a steady 753 Hz sound from its siren? The speed of sound on this day is 345 m/s. Hz(b) What frequency does she receive after the ambulance has passed? Hz