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12. As a train pulls out of the station going 50 m/s it blasts its horn,...
A train is moving at 23 m/s east when it blasts its horn at a frequency...
A train is moving at 23 m/s east when it blasts its horn at a frequency of 164 Hz. what frequency is heard by the driver of a car moving east at 15 m/s along a road parallel to the tracks? the speed of sound is 343 m/s.
A train: A enters a train station with constant speed of .00 m/s while another train...
A train: A enters a train station with constant speed of .00 m/s while another train B leaves the train station with constant speed of 4.00 m/s. At a moment they are both at the same distance of 1 km from the train station they whistle two identical sounds of 400. Hz with acoustic power of 70.0 W each. A passenger standing on the station platform. No wind is blowing. (a) What is the frequency of the sound from A...
1. A train travelling at 40 m/s has a horn that vibrates at a frequency 200...
1. A train travelling at 40 m/s has a horn that vibrates at a frequency 200 Hz. Calculate the frequency of the horn's sound heard by a bicycling rider travelling at 10 m/s in same direction as the train when the bike is ahead of the train.
Doppler Effect You are waiting at a train station when an approaching express train sounds its...
Doppler Effect You are waiting at a train station when an approaching express train sounds its 400 Hz horn, warning everyone to stand back from the platform as it passes. If you perceive the frequency of the horn to be 425 Hz as the train approaches, how fast must the train be moving towards you? You may assume the speed of sound is 343 m/s.
A commuter train blows its 200 Hz horn as it approaches a crossing. The speed of...
A commuter train blows its 200 Hz horn as it approaches a crossing. The speed of sound is 330 m/s. (a) An observer waiting at the crossing receives a frequency of 210 Hz. What is the speed of the train (in m/s)? (b) What frequency (in Hz) does the observer receive as the train moves away?
A Train is traveling 23 m/s while honking their horn of at a frequency of 200...
A Train is traveling 23 m/s while honking their horn of at a frequency of 200 Hz. a) What is the observed frequency of an observer sitting on the train? b) What is the observed frequency of a stationary observer behind the train? c) What is the observed frequency of a stationary observer in front of the train? d) What is the observed frequency of an observer behind the train and trying to catch the train but only running 3...
A light-rail commuter train blows its 200 Hz horn as it approaches a crossing. The speed...
A light-rail commuter train blows its 200 Hz horn as it approaches a crossing. The speed of sound is 337 m/s. (a) An observer waiting at the crossing receives a frequency of 221 Hz. What is the speed of the train? m/s (b) What frequency does the observer receive as the train moves away? Hz
A train on one track moves in the same direction as a second train on the...
A train on one track moves in the same direction as a second train on the adjacent track. The first train, which is ahead of the second train and moves with a speed of 36.4 m/s, blows a horn whose frequency is 123 Hz. Part A If the frequency heard on the second train is 134 Hz , what is its speed?
A train travelling at 43.4 m/s is approaching a stationary observer, and sounding a warning horn...
A train travelling at 43.4 m/s is approaching a stationary observer, and sounding a warning horn at 448 Hz. If the speed of sound is 340.7 m/s, calculate the frequency which the observer hears, in Hz to 3 sf.
A train sounds its horn as it approaches an intersection. The horn can just be heard...
A train sounds its horn as it approaches an intersection. The
horn can just be heard at a level of 47 dB by an observer 10 km
away.
(a) What is the average power generated by the horn?
(b) What intensity level of the horn's sound is observed by someone
waiting at an intersection 43 m from the train? Treat the horn as a
point source and neglect any absorption of sound by the air.
A train: A enters a train station with constant speed of .00 m/s while another train B leaves the train station with constant speed of 4.00 m/s. At a moment they are both at the same distance of 1 km from the train station they whistle two identical sounds of 400. Hz with acoustic power of 70.0 W each. A passenger standing on the station platform. No wind is blowing. (a) What is the frequency of the sound from A...
1. A train travelling at 40 m/s has a horn that vibrates at a frequency 200 Hz. Calculate the frequency of the horn's sound heard by a bicycling rider travelling at 10 m/s in same direction as the train when the bike is ahead of the train.
A light-rail commuter train blows its 200 Hz horn as it approaches a crossing. The speed of sound is 337 m/s. (a) An observer waiting at the crossing receives a frequency of 221 Hz. What is the speed of the train? m/s (b) What frequency does the observer receive as the train moves away? Hz
A train on one track moves in the same direction as a second train on the adjacent track. The first train, which is ahead of the second train and moves with a speed of 36.4 m/s, blows a horn whose frequency is 123 Hz. Part A If the frequency heard on the second train is 134 Hz , what is its speed?
A train sounds its horn as it approaches an intersection. The
horn can just be heard at a level of 47 dB by an observer 10 km
away.
(a) What is the average power generated by the horn?
(b) What intensity level of the horn's sound is observed by someone
waiting at an intersection 43 m from the train? Treat the horn as a
point source and neglect any absorption of sound by the air.
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