Question

The sound emitted by the speaker at the rate 65w and the boy stand at a distance of 4.5m away from the speaker.find the intensity received by the boy ?

Answer 1

Answer:

sorry i Don't. so sorry I don't No

Answer 2

Given that,

Power of the sound emitted by the speaker is 65 W.

The  boy stand at a distance of 4.5 m away from the speaker.

To find,

The intensity received by the boy.

Solution,

The intensity of sound is given by the power emitted per unit area. It can be written as :

$I=\dfrac{P}{A}\\\\I=\dfrac{P}{4\pi r^2}\\\\I=\dfrac{65}{4\pi (4.5)^2}\\\\I=0.255\ W/m^2$

So, the intensity received by the boy is $0.255\ W/m^2$.

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Intensity sound

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