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Sound
Page 8
Questions (509)
a child standing in front of high cliff make a loud sound, and hears an echo after 30 seconds. Calculate how far is the child
2 answers
asked by
deng
496 views
Suppose a person is going to be exposed to a steady tone of frequency 8000 Hz all night (perhaps arising from noisy electronics
1 answer
asked by
dreadantlers
535 views
Can sound exist in a vacuum?
No Yes...my hoover is loud when I turn it on! Ignore Eddie's remark. His Hoover is not in a vacuum.
1 answer
asked by
Michael
513 views
Someone is blowing over the top of a water bottle creating a noise. If the bottle is 0.3m tall and has 0.1m of water in it, find
1 answer
asked by
Anonymous
501 views
1. A person driving to the right and honks their horn. An observer standing behind the car, opposite its direction of motion
2 answers
asked by
Tina
522 views
A 50cm long hollow glass cylinder is open at both ends and is suspended in air. A source o sound that produces a pure frequency
2 answers
asked by
Melissa
499 views
A loud speaker at a rock concert generates 102 W/m2 at 20m with a frequency of 1
kHz. Assume that the speaker spreads its
1 answer
asked by
nizar
511 views
Ten cars at an intersection are blowing their horns simultaneously, creating a 100 decibel sound in the middle of the
3 answers
asked by
Jared
497 views
A mine shaft is known to be 57.8 m deep. If you would drop a rock down the shaft, how long would it take for you to hear the
1 answer
asked by
Alina
494 views
I am reposting this since I did so incorrectly the first time. (I apologize for posting it twice the first time as well...I
3 answers
asked by
Nicole
502 views
18 cars in a circle at a boom box competition produce a 105 dB sound level at the center of the circle. What is the average
1 answer
asked by
ddsMom
490 views
If one machine creates a level of 90 decibels, what decibel level would be generated by 50 of these machines? If sounds are
3 answers
asked by
Lindsey
494 views
Two sounds have measured intensities of I1 = 110 W/m2 and I2 = 330.00 W/m2. By how many decibels is the level of sound 1 lower
2 answers
asked by
Hannah
494 views
A bat flying in a cave emits a sound and receives its echo 0.9 s later. How far away is the cave wall?
The distance there and
2 answers
asked by
Allie
488 views
A radio set at a sound level of 20 dB is suddenly increased to 80 dB. how many more time greater is the pressure amplitude at 80
2 answers
asked by
emily
473 views
A faint sound with an intensity of 10 -9 W/m2 is measured by an intensity-level meter. What will the reading be in dB?
2 answers
asked by
jeremy
490 views
You call out to your friend who is standing at a distance of 350 m.
a) if the temperature of the air is 35 degrees Celsius, find
13 answers
asked by
Kiki
492 views
A policeman with a very good ear and a good understanding of the Doppler effect stands on the shoulder of a freeway assisting a
2 answers
asked by
maria
484 views
A source of sound (1200 Hz) emits uniformly in all directions. An observer 2.99 m from the source measures a sound level of 41.1
1 answer
asked by
Madeline
485 views
The 17500 Hz whine of the turbines in the jet engines of an aircraft moving with speed 280 m/s is heard at what frequency by the
2 answers
asked by
Kyle
484 views
(a) By what factor is one sound more intense than another if the sound has a level 17.0 dB higher than the other?
(b) If one
1 answer
asked by
Justin
462 views
Sound A is 32dB. Sound B is 54 dB. How many times more intense is Sound B than Sound A?
1 answer
asked by
Chuck
456 views
what is audible range of frequencies of sound in humans?calculate the corresponding range of audible wavelengths.
1 answer
asked by
naila
464 views
A train is sounding a horn of constant frequency shows down as it nears a station. What change in pitch is heard by a commuter
1 answer
asked by
Sylvia
485 views
A light-rail commuter train blows its 200 Hz horn as it approaches a crossing. The speed of sound is 330 m/s.
1 answer
asked by
Anonymous
468 views
An object is vibrating.Yourdog can hear it but you cant .What most likely is happeningz?
A.ther is no matter to carry the
1 answer
asked by
Hot Stuff
469 views
Two Astronauts A and B are working in the space shuttle in the space.Suddenly the hammer falls from the hands of astranaut in
1 answer
asked by
christina
466 views
the speed of sound in air is given for still air. how would wind affect the speed? what would happen if you shouted into the
1 answer
asked by
duane
465 views
A sound wave has a frequency of 1640 Hz. The air temperature is 46 degress F.
What is the speed? v = What is the wavelenght of
1 answer
asked by
sean
466 views
What is the number of the highest harmonic that could be heard by a person who is capable of hearing frequencies up to 1.00×104
1 answer
asked by
Marie
463 views
A train sounds its horn as it approaches an intersection. The horn can just be heard at a level of 53 dB by an observer 11 km
1 answer
asked by
Anonymous
466 views
a) A microphone has an area of 5cm^2. It receives during a 4.0 s time period a sound energy of 2.0*10^-11 J. What is the
1 answer
asked by
Dean
476 views
We're in class with a SIL decibel meter up front, and everyone is screaming at the top of their lungs, hooting and shouting and
1 answer
asked by
Quick question
451 views
Find the intensity level 10m from a 0.24 watt source of sound energy?
1 answer
asked by
shan
458 views
When I sing into a microphone, suppose I produce a sound intensity level (SIL) of 40 dB. If you can sing at 60 dB, what is the
1 answer
asked by
naomi
463 views
Jane and Sam alternately pound a railroad spike into a tie with their hammers. The crew chief has a migraine, and notes that
1 answer
asked by
shanelle james
449 views
Superman is a character from the DC Comics universe with superhuman abilities. One day in the city of Metropolis you look to the
3 answers
asked by
Ellie
455 views
how far can sound go on for
There is no limit to how far sound can go, as long as there is a matter-containing "medium" for it to
1 answer
asked by
duzgun
435 views
Find the beat frequency produced by an 686 Hz source and an 894 Hz source.
1 answer
asked by
Abby
435 views
Find the number of decibels for the power of the sound given. Round to the nearest decibel.
A rocket engine, 2.32 cross product
1 answer
asked by
LI
433 views
A sheet of 6 cm in thickness causes the original intensity to decrease to 59% of its original value. You are trying to build a
4 answers
asked by
dawn
444 views
Find the number of decibels for the power of the sound given. Round to the nearest decibel.
A rocket engine, 2.37 cross 10−5 (
1 answer
asked by
elise
443 views
Where do sound waves travel faster?
1. Through less dense materials, because the molecules in a loosely packed medium collide
1 answer
asked by
aaa
68 views
A construction explosion has an intensity I of 1.25 x 10–^4 W/m^2. Find the loudness of the sound in decibels if L=101og I/I0
1 answer
asked by
Ani Walker
155 views
An ambulance has just passed by your home. You detect that the frequency of the receding siren is
900.0 Hz. If you know that the
1 answer
asked anonymously
44 views
a construction explosion has an intensity i of 1.25 × 10-^4 W/m^2. find the loudness of the sound in decibels if L=10log1/1o
1 answer
asked by
M
91 views
Sound travels about 343 meters per second. The function d(t) = 343t gives the distance d(t) in meters that sound travels in t
1 answer
asked anonymously
52 views
How does the speed of sound in water compare to the speed of sound in air?
A.The speed of sound is faster in water because the
1 answer
asked by
Bray
59 views
While standing on 3rd street you hear an approaching ambulance. Its siren oscillates in frequency between about 650 Hz and 750
1 answer
asked by
Anonymous
460 views
A room with which type of surface will most likely produce an echo?(1 point)
Responses foam foam dirt dirt glass glass carpet
1 answer
asked by
I hate math
69 views
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