Ex. 60 Two sources of sound produce waves differing in wavelength by 12 cm. If the frequencies of sound are 320 Hz and 360 Hz, calculate the velocity of sound in air.
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![Ex. 60: Two sources of sound produce waves
differing in wavelength by 12 cm. If the
frequencies of sound are 320 Hz and 360 Hz,
calculate the velocity of sound in air.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F147c4dd7-f8df-4bec-8745-3412f3becb8e%2F552f8cb7-f56a-4b0c-826f-b6ebb895e626%2Fb28p5ca_processed.jpeg&w=3840&q=75)
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- 30 m from an ultrasonic sensor. The total travel time of the ultrasonic wave is 33 ms (milliseconds). What is the speed of sound in these conditions?A source emits sound waves isotropically. The intensity of the waves 3.13 m from the source is 1.99 x 104 W/m². Assuming that the energy of the waves is conserved, find the power of the source. Number i Units#5) The speed of sound waves depends upon the material through which they are travelling. Sound travels 15 times faster through metal railway tracks; thus, the speed of sound in the train tracks is 5145 m/s. This explains the train trestle seen in the 1986 film, Stand by Me, when one of the boys puts his ear to the train tracks before the band of boys crosses the long train trestle bridge together. What is this speed of sound in inches per minute in the train tracks? There are 2.54 cm per inch, there is 60 seconds in one minute, 5280 ft in one mile, 1609 meters in 1 mile, and 12 inches per foot, more conversions are on your equation sheets. Report answer to 3 sig figs.
- A pier stretches from the coastline out into the sea a distance of 180 m. Waves on the sea move past the pier as they head toward the shore. The distance between the crests of the waves is 15 m, and the wave crests travel from the end of the pier to the shore in 24 seconds. What is the frequency of the waves? O 0.3 Hz 0.4 Hz O 0.5 Hz O 0.6 HzA stereo speaker produces a pure "C" tone, with a frequency of 262 Hz. What is the period T of the sound wave produced by the speaker? S T What is the wavelength Awater of the same sound wave as it enters some water, where it has a speed of about 1480 m/s? Awater What is the wavelength Aair Oof this sound wave as it travels through air with a speed of about 341 m/s? m AairA bird is flying directly toward a stationary bird-watcher and emits a frequency of 1.09 × 10³ Hz. The bird-watcher, however, hears a frequency of 1.17 × 103 Hz. What is the speed of the bird, expressed as a percentage of the speed of sound? Number i eTextbook and Media Save for Later 7 # C $ Units וום Attempts: 0 of 3 used Submit Answer 8 E Apr 30 5
- the speed of sound in stationary air vs=330m/s, a train leaves the station with a speed of u=30m/s, a person on the platform blows a whistle. A) determine the speed of sound produced by the whistle as measured by a person on the train. b) determine the speed of sound produced by the whistle as measured by a person on the platform.Determine the wavelength of the sound for 24 Hz. Determine the wavelength of the sound for 23 kHz.4. A car, sounding its horn, is moving at v. =158.4km / h directly toward a stationary wall in still air. The speed of sound, in the air, is v=330.0 m/s. The horn produces sound at a frequency of f. =1000.Hz (ie. if the car were stationary, that is the frequency you would hear). a) What frequency is heard by an observer at rest at the wall (assume the car is moving straight toward the observer)? b.) What is the wavelength, in the still air, of the sound wave approaching the wall? c) What is the frequency of the reflected sound heard by an occupant of the car?
- 18. A sound wave s(r, t) = sm Cos(ka – wt +o) travels at 343 m/s through air in a long horizontal tube. At one instant, air molecule A at r = 2.00 m is at its maximum positive displacement of 6.0 nm and air molecule B at r = a positive displacement of 1.5 nm. All the molecules between A and B arc at intermediate displacements. What is the 2.05 m is at frequency of the wave? (1) 1400 Hz (2) 1300 Hz (3) 1200 Hz (4) 1100 Hz (5) 1000 HzA group of hikers hears an echo 2.60 s after shouting. How far away is the mountain that reflected the sound wave? (Assume the speed of sound is 349 m/s.) m