Question

An observer experiences a sound wave intensity 9.00×10-5 W⋅m−2W⋅m−2 at a distance 5.22 m from a...

An observer experiences a sound wave intensity 9.00×10-5 W⋅m−2W⋅m−2 at a distance 5.22 m from a source which emits wave in all direction. What is power of the source?

Science   Physics   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

The intensity (I) of a wave is defined as the ratio of the power (P) to the area perpendicular to the direction of energy flow that the energy passes through.

So, in above case the source emits wave in all directions (so, it is a spherical wave) , so the energy it carries spread over a larger area. And since it is a spherical wave its area (A) is 4*pi*r2. So,

here, r = distance of observer from source = 5.22 m

On solving,

Power (P) = 30.82 mW

Please rate if you like it.

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
Intensity can be expressed as power divided by the area over which the wave spreads out....
Intensity can be expressed as power divided by the area over which the wave spreads out. If a wave is spreading out evenly in all directions, then we can use a sphere to represent the area over which the wave has spread out. We want to calculate the intensity of a 59.4-W sound source at a distance of 9.00 m under the assumption that the wave is spreading out evenly in all directions. What is the surface area of a...
Chapter 17, Problem 095 The sound intensity is 0.0070 W/m2 at a distance of 13 m...
Chapter 17, Problem 095 The sound intensity is 0.0070 W/m2 at a distance of 13 m from an isotropic point source of sound. (a) What is the power of the source? (b) What is the sound intensity 6.3 m from the source? (c) What is the sound level 13 m from the source?
The sound intensity of a conversation at a distance of 6.0 m is 1.7 x 10^-7...
The sound intensity of a conversation at a distance of 6.0 m is 1.7 x 10^-7 W / m^2 . Determine the intensity at a distance of 5.0 m. Assume that the sound spreads evenly in all directions. (10 points)
1. At a distance of 15.0 m from a sound "point" source, the sound intensity level...
1. At a distance of 15.0 m from a sound "point" source, the sound intensity level is 65.0 dB. What is the power generated by this source? 2.A 4.0-g string is 0.36 m long and is under tension. The string vibrates at 500 Hz in its third harmonic. What is the tension in the string?
A person standing 1.25 m from a portable speaker hears its sound at an intensity of...
A person standing 1.25 m from a portable speaker hears its sound at an intensity of 7.90 ✕ 10−3 W/m2. HINT (a) Find the corresponding decibel level.   dB (b) Find the sound intensity (in W/m2) at a distance of 36.0 m, assuming the sound propagates as a spherical wave.   W/m2 (c) Find the decibel level at a distance of 36.0 m.
An outside loudspeaker (considered a small source) emits sound waves with a power output of 117...
An outside loudspeaker (considered a small source) emits sound waves with a power output of 117 W. (a) Find the intensity 11.0 m from the source. W/m2 (b) Find the intensity level in decibels at that distance. dB (c) At what distance would you experience the sound at the threshold of pain, 120 dB? m
A sound source emits an acoustic power of 0.5 W uniformly in all Spatial directions. What...
A sound source emits an acoustic power of 0.5 W uniformly in all Spatial directions. What is the sound pressure level of this sound wave in 50 m Distance generated when she a) hanging freely in the room, b) on a reverberant floor, c) on a reverberant floor immediately in front of a reflective wall stands?
Problem 6:   Two students are standing the same distance from a source of sound. The first...
Problem 6:   Two students are standing the same distance from a source of sound. The first student receives a power of 246 × 10-6 W in their eardrum. The second student receives σ = 1.17 times more power in their eardrum. (A) If the second student's eardrum has a diameter of d = 1 cm what was the intensity of the sound that the student heard, in watts per square meter? (B) In this problem take the speed of sound...
1. A person standing 1.00 m from a portable speaker hears its sound at an intensity...
1. A person standing 1.00 m from a portable speaker hears its sound at an intensity of 7.50 x10^ -3 W/m^2 . (a) Find the corresponding decibel level. (b) Find the sound intensity at a distance of 35.0 m, assuming the sound propagates as a spherical wave. (c) Find the decibel level at a distance of 35.0 m
A woman stands a distance d from a loud motor that emits sound uniformly in all...
A woman stands a distance d from a loud motor that emits sound uniformly in all directions. The sound intensity at her position is an uncomfortable 4.3×10-3 W/m2. At a distance 2.7 times as far from the motor, what are (a) the sound intensity and (b) the sound intensity level relative to the threshold of hearing?
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT