Physics

posted by .

Three sources of sound are distributed along a line, as shown in the figure. v is the speed of sound. Source A is at rest, and it emits sound waves with a frequency of 480 Hz. Source B is traveling at v/5 to the right, and it emits sound waves with a frequency of 960 Hz. Source C is traveling at a speed of v/3 to the left, and it emits sound waves with a frequency of 1550 Hz. A, B, and C also detect the sound waves emitted by the other sources. All the questions below pertain to when the three sources of sound are at the locations shown in the figure below.



a)What frequency does A observe for the waves emitted by B? (A = observer; B = source)

b) What frequency does C observe for the waves emitted by A? (C = observer; A = source)

c)What frequency does B observe for the waves emitted by C? (B = observer; C = source)

  • Physics -

    a. Fa = ((V-Va)/(V+Vb))*Fb
    Fa = ((343-0)/(343+68.6))*960 = 800 Hz

    b. Fc=((343+114.33)/(343-0))*480=640 Hz.

    c. Fb = ((343+68.6)/(343-114.33))*1550
    Fb = 2790 Hz.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. physics

    1)As a sound source moves away from a stationary observer, the number of waves will. A)increase B)decrease C)remain the same D)need to know the speed of the source (answer:decrease.) As the detector recedes from the source, the relative …
  2. physics

    1.calculate th speed of waves in water that are 0.4m apart and have a frequency of 2hz?
  3. physics pls help

    A sound source producing 1.00-{\rm kHz} waves moves toward a stationary listener atone-half the speed of sound. The frequency that the listener will hear is2000 Hz. when the source is stationary and the listener moves towardthe source …
  4. physics

    a source of sound id traveling towards a stationary observer .The frequency of sound is heard by the observer is 25% more that the actual frequency.If the speed of sound is v,that of the source is options: 1.v/4 2.v/5
  5. Physics(Please respond)

    A source emits sound uniformly in all directions. There are no reflections of the sound. At a distance of 12 m from the source, the intensity of the sound is 1.7 × 10-3 W/m2. What is the total sound power P emitted by the source?
  6. physics PLEASE HELP

    A source emits sound uniformly in all directions. There are no reflections of the sound. At a distance r1 from the source the sound is 6.5 dB louder than it is at a distance r2 from the source. What is the ratio r1/r2?
  7. physics

    A train at rest emits a sound at a frequency of 1089 Hz. An observer in a car travels away from the sound source at a speed of 30.7 m/s. What is the frequency heard by the observer?
  8. phy

    Doppler ultrasound is used to measure the speed of blood flow. If the speed of the red blood cells is v, the speed of sound in blood is u, the ultrasound source emits waves of frequency f, and we assume that the blood cells are moving …
  9. physics

    if a man moving away with the speed of 0.5 of sound from a stationary sound source producing a sound of frequency , he would hear a sound of frequency
  10. science

    apparent change in wavelength of sound waves is 2.5cm when the source of sound is approaching stationary listener with velocity 8cm/s.Apparent decrease in the frequency of source when observer recedes from the same source at rest with …

More Similar Questions