Homework Help: physics

Posted by Coreen on Sunday, April 29, 2007 at 1:26am.

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.

No one has answered this question yet.

Answer this Question

Related Questions

physics - A student sets up two speakers spaced 2.5 meters apart, each playing ...
Physics - A pair of in-phase stereo speakers is placed side by side, 0.85 m ...
physics - Two speakers are separated by distance d1 = 2.40 m and are in phase. ...
Physics - suppose that the separation between speakers A and B is 5.80 m and the...
physics - Two loudspeakers in a 20°C room emit 629 Hz sound waves along the ...
physics - A college student is at a concert and really wants to hear the music, ...
physics - A college student is at a concert and really wants to hear the music, ...
physics - A college student is at a concert and really wants to hear the music, ...
U. Physics - Two loudspeakers are placed 3.00m apart. They emit 485 Hz sounds, ...
Physics - Two small stereo speakers A and B that are 1.4 m apart are sending out...

For Further Reading

First Name:
School Subject:
Answer: