Question

In: Physics

A small omnidirectional stereo speaker produces waves in all directions that have an intensity of 8.00...

A small omnidirectional stereo speaker produces waves in all directions that have an intensity of 8.00 at a distance of 4.00 from the speaker.

At what rate does this speaker produce energy?

What is the intensity of this sound 9.50 from the speaker?

What is the total amount of energy received each second by the walls (including windows and doors) of the room in which this speaker is located?

Solutions

Expert Solution

given that
    radius r = 4.00 m
      intensity I = 8.00 W/m^2
a) total power = power/ Area ( 4πr2)
                        = 8.00 w/m^2 ( 4π ( 4.00 m)2
                         =1607.68 W


b) I = total power/ 4πr2
        = 8.00 W/m2 ( 4.00 m/ 9.5 m)2
         = 1.418 W/m2


c)   E = total power x time
            = 1607 . 68 W x 1s
            = 1607.68 J

genius_generous answered 2 years ago
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