Question

A sound wave of frequency 349 Hz has an intensity of 4.03 ?W/m2. What is the...

A sound wave of frequency 349 Hz has an intensity of 4.03 ?W/m2. What is the amplitude of the air oscillations caused by this wave? (Take the speed of sound to be 343 m/s, and the density of air to be 1.21 kg/m3.)

Science   Physics   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

given

f = 349 Hz

V = 343 m/s

= 1.21 kg/m3  

I = 4.03 W/m2   

and = 2 f

using equation

I = 1/2 V 2 A2

4.03 X 10-6 = 0.5 X 343 X 1.21 X ( 2 X 3.14 X 349 )2 X A2

A2 = 4.03 X 10-6 / 0.5 X 343 X 1.21 X ( 2 X 3.14 X 349 )2   

A2 = 4.0428 X 10-15

A = 6.35 X 10-8 m

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
When we are angry, we unconsciously increase the intensity of the sound we emit. In a...
When we are angry, we unconsciously increase the intensity of the sound we emit. In a soap opera, the cast is acting angry with each other with a level of 79 dB, then they make up so that the sound output becomes 57 dB. The frequency of their sound is 337 Hz, the velocity of sound in the air is 344 m / s and the density of the air is 1.21 kg / m3. What is the sound intensity...
13. The pressure amplitude of a 500.0 Hz sound wave is 2.0 x 10-2 Pa. The...
13. The pressure amplitude of a 500.0 Hz sound wave is 2.0 x 10-2 Pa. The bulk modulus of air is 1.42 x 105 Pa and the density of the air is 1.2 kg/m3. Find: (a) The speed of sound in air. (344.0 m/s) (b) The displacement amplitude. (c) The intensity of the wave. (d) The intensity level of sound.
An experimenter wishes to generate in air a sound wave that has a displacement amplitude of...
An experimenter wishes to generate in air a sound wave that has a displacement amplitude of 4.50 10-6 m. The pressure amplitude is to be limited to 0.810 Pa. What is the minimum wavelength the sound wave can have? (Take the equilibrium density of air to be ρ = 1.20 kg/m3 and assume the speed of sound in air is v = 343 m/s.)
Suppose that the sound level of a conversation is initially at an angry 71 dB and...
Suppose that the sound level of a conversation is initially at an angry 71 dB and then drops to a soothing 51 dB. Assuming that the frequency of the sound is 504 Hz, determine the (a) initial and (b) final sound intensities and the (c) initial and (d) final sound wave amplitudes. Assume the speed of sound is 343 m/s and the air density is 1.21 kg/m3.
Hi everyone, I have a problem about physics. The question is as below: A certain loudspeaker...
Hi everyone, I have a problem about physics. The question is as below: A certain loudspeaker system emits sound isotropically with a frequency of 1740 Hz and an intensity of 0.853 mW/m2 at a distance of 6.79 m. Assume that there are no reflections. (a) What is the intensity at 40.6 m? At 6.79 m, what are (b) the displacement amplitude and (c) the pressure amplitude of the sound? Take the speed of sound to be 343 m/s and the...
What is the intensity of a sound that would result in a sound intensity level of...
What is the intensity of a sound that would result in a sound intensity level of 45.5 dB? Give the answer in scientific E-notation.    A fixed warning siren produces a pitch (frequency) of 888 Hz. An observer drives directly away from the blaring warning siren at 55.0 mph. Use 343 m/s for the speed of sound in air. What frequency is heard by the observer?    If the speed of sound in air is found to be 352 m/s...
What is the intensity level of a sound with an intensity of 3.5 x 10-8 W/m2?...
What is the intensity level of a sound with an intensity of 3.5 x 10-8 W/m2? 35.4 dB 49.1 dB 45.4 dB 13.4 dB Two cellos are being played in a duet. At a certain point, one cello plays a note of frequency 196 Hz and the other plays a note of frequency 220 Hz. What is the period of the beat? 0.4 s 4 s 0.25 s 0.1 s
Suppose that the sound level of a conversation is initially at an angry 73 dB and...
Suppose that the sound level of a conversation is initially at an angry 73 dB and then drops to a soothing 51 dB. Assuming that the frequency of the sound is 524 Hz, determine the (a) initial and (b) final sound intensities and the (c) initial and (d) final sound wave amplitudes. Assume the speed of sound is 345 m/s and the air density is 1.21 kg/m3.
Sound wave 1 has a frequency of 200 Hz in a particular medium. Sound wave 2...
Sound wave 1 has a frequency of 200 Hz in a particular medium. Sound wave 2 has a frequency of 300 Hz in the same medium. By what factor does the speed of sound wave 2 differ compared to sound wave 1
The sound level of a certain sound is at 85 dB. This sound has a frequency...
The sound level of a certain sound is at 85 dB. This sound has a frequency of 1250 Hz.. It travels in a copper beam. The density of copper is 8.92 g/cm3 . Its elastic-modulus is 11x1010 Pascals . a) Find the speed of sound inside the copper beam and the intensity of this sound-wave.   Answer: v=3511 m/s; I=3.16E-4W/m2 ; ∆P=141Pa; b) Find the maximum speed of the vibrating copper particles. Answer: smax=5.74E-10m; vmax=4.5E-6m/s
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT