Physics

You are standing at the midpoint between two speakers, a distance D away from each. The speakers are playing the exact same sound of frequency 170 Hz in phase with each other. Describe what happens when you walk 1.5 m directly toward one of the speakers. Assume the speed of sound is 340 m/s. Also assume you can't hear any sounds except those produced by the speakers.

Group of answer choices :

You begin by hearing nothing, but the sound gets louder. Then it gets quieter again until you can't hear it anymore.

You begin by hearing nothing, but the sound gets louder. Then it gets quieter again until you can't hear it anymore. Then it gets louder again.

You begin by hearing a loud sound that gets quieter until you can't hear it anymore. Then it gets louder again until it is as loud as where you started. Then it gets quieter again until you can't hear it anymore.

You begin by hearing nothing, but the sound gets louder.

You begin by hearing a loud sound that gets quieter until you can't hear it anymore. Then it gets louder again until it is as loud as where you started.

You begin by hearing a loud sound that gets quieter until you can't hear it anymore.

  1. 👍
  2. 👎
  3. 👁
  1. https://en.wikipedia.org/wiki/Standing_wave
    In the middle they are in phase and you hear loud.
    period = 1/170 s
    wavelength = 340 m/s* (1/170 s) = 2 meters
    so we move 3/4 of a wavelength.
    The standing wave is of form
    2 A cos 2 pi x/L * cos wt
    note used cos to make max at x = 0 in middle
    if x/L = 3/4
    we have
    2 A cos 6 pi /4* cos wt
    = 2 A cos 3pi /2 * cos wt
    well cos 3 pi/2 = ZERO!!!, silent there and every quarter wavelength thereafter until you hit the far wall

    1. 👍
    2. 👎
    👤
    Damon
  2. I mean every half wavelength until you hit the wall.

    1. 👍
    2. 👎
    👤
    Damon

Respond to this Question

First Name

Your Response

Similar Questions

  1. Geometry; Check answers?

    For each graph, find (a)AB to the nearest tenth and (b)the coordinates of the midpoint of AB. 1. Coordinates are A(-9, -6) B(6,6) D=19.2 Midpoint=(1.5,-6) 2.A(-2,-2) B(8,-6) D=10.77 midpoint= (3,-4) 3. A(0,3) B(-2,-2) D=5.4

  2. trigonometry

    A surveyor wishes to calculate the distance between the two trees B and C across a river from where he is standing. If the distance from his position, A to B is 70 meters, the distance from C to A is 100 m,and the angle of A is

  3. Physics

    Two identical speakers, labeled Speaker 1 and Speaker 2, are playing a tone with a frequency of 175 Hz in phase. The centers of the speakers are located 6.00 m apart. Five observers are standing on a line that is 6.00 m in front

  4. MATH (PLZ HELP)

    JK bisects LM at point D which of the following is true about point D? Draw a picture to help you answer the question. A. D is the midpoint of JK B. D is both the midpoint of JK and the midpoint of LM C. D is the midpoint of LM D.

  1. Physics

    A pair of speakers separated by distance d = 0.900 m are driven by the same oscillator at a frequency of 670 Hz. An observer originally positioned at one of the speakers begins to walk along a line perpendicular to the line

  2. 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

  3. Physics Help, Please

    The figure below shows two speakers, A and B, which are emitting identical, synchronized (in-phase) sound waves at 240kHz. A person standing a point C hears a relatively loud sound. She then starts walking towards point D, and

  4. Physics

    Both drawings show the same square, each of which has a side of length L=0.75 m. An observer O is stationed at one corner of each square. Two loudspeakers are locate at corners of the square, as in either drawing 1 or drawing 2.

  1. physics

    Tweety Bird hops up and down at a frequency of 0.4 Hz on a power line at the midpoint between the poles, which are separated by 18 m. Assuming Tweety is exciting the fundamental standing wave, find the speed of transverse waves on

  2. math

    1.A line segment on a number line has its endpoints at -9 and 6 find the coordinate of the midpoint of the segment. Answer choices are A.1.5 B.-1.5 C.2 D.-3 2.find the coordinate of the midpoint of HX given that H(-1,3) and

  3. 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

  4. Physics

    A stretched wire resonates in one loop. The midpoint of the wire oscillates with an amplitude of A. What is the traveled distance of the midpoint in one period? Please help me understand this relationship. Thank you very much!

You can view more similar questions or ask a new question.