physics

posted by .

While standing on 3rd street you hear an approaching ambulance. Its siren oscillates in frequency between about 650 Hz and 750 Hz.

Later on as you near your destination, you come upon the scene of the accident. The now-stationary ambulance runs its siren as it's about to drive off. This time, you hear its pitch oscillate between 637.65 Hz and 735.75 Hz.

Using your physics knowledge, you estimate the speed that the ambulance must have been traveling while en route to the scene of the accident. How fast was it traveling? (Assume it's an average day where the speed of sound is about 343 m/s.)

A. 25 m/s (about 55 mph)

B. 18 m/s (about 40 mph)

C. 13 m/s (about 30 mph)

D. 9 m/s (about 20 mph)

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. PHYSICS

    The frequency of an ambulance siren is 700 Hz. If a pedestrian on the side of the road hears the siren at 756 Hz approximately how fast and in what direction is the ambulance moving?
  2. science

    An ambulance is going down the street with its lights and siren on. the hospital is five blocks away. select all the statements that are observations. a) the ambulance is moving b) the ambulance is going to the hospital c) the ambulance …
  3. College Physics

    An ambulance is approaching at 80 mph (35.8 m/s). If the siren produces a continuous 400 Hz tone, what frequency do you hear?
  4. Physics

    Initially, you hear the siren at 90 dB. When the distance between you and the ambulance is a quarter of what it was initially, at what intensity level do you hear the siren?
  5. physical

    You are driving along a highway at 27.7 m/s when you hear a siren. You look in the rear-view mirror and see a police car approaching you from behind with a constant speed. The frequency of the siren that you hear is 1830. Hz. Right …
  6. physics

    While standing on 3rd street you hear an approaching ambulance. Its siren oscillates in frequency between about 650 Hz and 750 Hz. Later on as you near your destination, you come upon the scene of the accident. The now-stationary ambulance …
  7. physics

    The siren on an ambulance is emitting a sound whose frequency is 2421 Hz. The speed of sound is 343 m/s. (a) If the ambulance is stationary and you (the "observer") are sitting in a parked car, what are the wavelength and the frequency …
  8. physics

    An ambulance is traveling east at 60.7 m/s. Behind it there is a car traveling along the same direction at 32.3 m/s. The ambulance driver hears his siren at a frequency of 521 Hz. At what frequency does the driver of the car hear the …
  9. Physics

    The siren of an ambulance has a frequency f=500 Hz. A pedestrian standing on a sidewalk listens to this siren as the ambulance passes by at a speed of 65 mph. The speed of sound in air is 330 m/s. a) Calculate the total shift in frequency …
  10. Physics

    Not at all sure where to start with this problem. Any help would be appreciated! The siren of an ambulance has a frequency f=500 Hz. A pedestrian standing on a sidewalk listens to this siren as the ambulance passes by at a speed of …

More Similar Questions