A 1.0 W point source emits sound waves isotropically. Assuming that the energy of the waves is conserved, find the intensity, 2.5 m from the source. Show your solution and answer for the intensity 2.5 m from the source.

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Activity Proper:
Activity No. 1 – Sound: Problem Solving
Sound. Answer the following problem involving intensity of sound.
Examples with solution:
a. A 1.0 W point source emits sound waves isotropically. Assuming that the energy
of the waves is conserved, find the intensity, 1.0 m from the source:
Solution and Answer:
Ps
4ar²
1 W
W
= 8 x 10-2
m2
4п(1 m)2
b. A point source emits sound waves isotropically. The intensity of the waves 2.50
m from the source is 1.91 x 10-4. Assuming that the energy of the waves is
conserved, find the power of the source.
Solution and Answer:
m²
P = (4ar²)(1)
P = (4m(2.5 m)²)(1.91 × 10-4
From / =
m2
P = 1.5 x 10-2 w
Page 2 of 4
1. A 1.0 W point source emits sound waves isotropically. Assuming that the energy
of the waves is conserved, find the intensity, 2.5 m from the source.
Show your solution and answer for the intensity 2.5 m from the source.
Transcribed Image Text:Activity Proper: Activity No. 1 – Sound: Problem Solving Sound. Answer the following problem involving intensity of sound. Examples with solution: a. A 1.0 W point source emits sound waves isotropically. Assuming that the energy of the waves is conserved, find the intensity, 1.0 m from the source: Solution and Answer: Ps 4ar² 1 W W = 8 x 10-2 m2 4п(1 m)2 b. A point source emits sound waves isotropically. The intensity of the waves 2.50 m from the source is 1.91 x 10-4. Assuming that the energy of the waves is conserved, find the power of the source. Solution and Answer: m² P = (4ar²)(1) P = (4m(2.5 m)²)(1.91 × 10-4 From / = m2 P = 1.5 x 10-2 w Page 2 of 4 1. A 1.0 W point source emits sound waves isotropically. Assuming that the energy of the waves is conserved, find the intensity, 2.5 m from the source. Show your solution and answer for the intensity 2.5 m from the source.
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