physics

posted by .

Speakers A and B are vibrating in phase. They are directly facing each other, are 7.4 m apart, and are each playing a 72.0 Hz tone. The speed of sound is 343 m/s. On the line between the speakers there are three points where constructive interference occurs. What are the distances of these three points from speaker A?
m (nearest)
m (middle)
m (farthest)


Calculate wavelength. When the difference in distances from each speaker are multiples of wavelength, construtcive interference occurs. For instance, if the wavelenght were 1 meter, then when distance A (speaker A to the point) = distance B -+ n Lambda

n= 0, 1, 2, ... constructive interference occurs. The easy solution is in the center, n=0. I suspect you will find a +- 1 solution.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Physics

    suppose that the separation between speakers A and B is 5.80 m and the speakers are vibrating in phase. They are playing identical 135 Hz tones, and the speed of sound is 343 m/s. What is the largest possible distance between speaker …
  2. physics

    Two speakers are separated by distance d1 = 2.40 m and are in phase. You are standing 3.00 m directly in front of one speaker. Each speaker has an output power of 1.20 W. Because the speakers are at different distances, there will …
  3. physics

    A college student is at a concert and really wants to hear the music, so she sits between two in-phase loudspeakers, which point toward each other and are 60.8 m apart. The speakers emit sound at a frequency of 428.75 Hz. At the midpoint …
  4. physics

    A college student is at a concert and really wants to hear the music, so she sits between two in-phase loudspeakers, which point toward each other and are 60.8 m apart. The speakers emit sound at a frequency of 428.75 Hz. At the midpoint …
  5. physics

    A college student is at a concert and really wants to hear the music, so she sits between two in-phase loudspeakers, which point toward each other and are 60.8 m apart. The speakers emit sound at a frequency of 428.75 Hz. At the midpoint …
  6. physics

    A student sets up two speakers spaced 2.5 meters apart, each playing the same tone of a single frequency. She stands at point P, at an equal distance from each speaker and hears the tone playing loudly. She walks towards point Q, directly …
  7. Physics

    Moe, Larry, and Curly stand in a line with a spacing of d = 1.40m . Larry is 3.00m in front of a pair of stereo speakers 0.800m apart, as shown in the figure(Figure 1) . The speakers produce a single-frequency tone, vibrating in phase …
  8. physics

    A man stands at the midpoint between two speakers that are broadcasting an amplified static hiss uniformly in all directions. The speakers are 28.0 m apart and the total power of the sound coming from each speaker is 0.602 W. Find …
  9. physics

    A man stands at the midpoint between two speakers that are broadcasting an amplified static hiss uniformly in all directions. The speakers are 37.0 m apart and the total power of the sound coming from each speaker is 0.448 W. Find …
  10. Physics

    Two speakers driven in a phase by the same amplifier at a frequency of 640 Hz, are 7 m apart. A listener originally at the position of one of the speakers starts walking away from that speaker in a direction that is perpendicular to …

More Similar Questions