A train approaches a station platform at a speed of 10 m/s, blowing its whistle at a frequency of 100 Hz, as measured by the engineer.  What frequency will be measured by a person on the platform walking in the same direction as the train is moving at 1 m/s?  (Assume the velocity of sound is 342 m/s.)

Q: A train is leaving the platform at the speed of 33 m/s.A person standing on the platform waiting for…

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Q: An ambulance moving at 35 m/s sounds its siren whose frequency is 480 Hz. A car is moving in the…

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Q: An alert physics student stands beside the tracks as a train rolls slowly past. He notes that the…

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Q: A person riding in car is blowing an air horn at a frequency of 302 Hz. You are sitting on a bench…

A: According to Doppler effect,  When observer is fixed and source is moving away from observer, then…

Q: What frequency (in Hz) is received by a person watching an oncoming ambulance moving at 106 km/h and…

A: This is the question is based on the Doppler's Effect.    The shifting of the frequency can be…

Q: An ambulance with a siren emitting a whine at 1450 Hz overtakes and passes a cyclist pedaling a bike…

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Q: A train sounds a horn that vibrates at a frequency of 400Hz, as heard by the engineer aboard the…

A: Recall Apparent frequency=f then  f=V±VDV±VsWhere V=speed of sound           VD=speed of detector…

Q: You are driving down the street with your windows open enjoying the nice day. On this nice 20°C day,…

A: The velocity of the sound, v = 343 m/s The original frequency of the whistle, f0 = 1450 Hz The…

Q: he calculates the speed of the train. What value does he find?

A: As per Doppler’s effect, the frequency observed by the student when the train approaching him, can…

Q: A police car is sounding a siren with 1280 Hz on a 20A???? You are driving down the road at 118…

A: Given data The frequency of the siren on 20° is f = 1280 Hz. The velocity of the car is vc = 118…

Q: A bee is emitting a frequency of 300Hz.  The bee is flying towards you at 2m/s while you are running…

A: The observed frequency when the source is moving towards the observer and the observer is moving…

Q: A fire truck is moving away a stationary observer at 18.2 m/s and has a siren frequency of 790 Hz.…

A: Given    A fire truck is moving away a stationary observer at 18.2 m/s and has a siren frequency of…

Q: Two train whistles have identical frequencies of 165 Hz. When one train is at rest in the station…

A: Sound waves are longitudinal waves as they travel in a direction parallel to their vibration…

Q: A fire engine moving at a speed of 34.0 m/s and blows the siren with a frequency 290 Hz. A truck is…

A: Given thatSpeed of listener VL=14.0m/sSpeed of the source Vs=34.0m/sVelocity of the sound in air V=…

Q: What frequency is received by the observer "B" moving at 23 km/h away from a firetruck at rest which…

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Q: An alert physics student stands beside the tracks as a train rolls slowly past. He notes that the…

A: Given : f1 = 463 Hz f2 = 440 Hz c = 343 m/s

Q: The frequency of the siren of a police car is 1000 Hz. What is the change in the frequency of the…

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Q: In this problem take the speed of sound to be 341 m/s.    How fast, in meters per second, does an…

A: Write the expression for apparent frequency using Doppler’s shift.

Q: A car moving at 20 m/s with its horn blowing (S = 1200 Hz) is chasing another car going at 15 m/s.…

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Q: A truck sounds a horn with a frequency of 115 Hz as it approaches a cliff. The speed of the truck is…

A: Given: Frequency of emitted sound =115 Hz speed of the truck is 10.5 m s–1 speed of sound in air is…

Q: An elf is moving behind a Orc bard that is singing very loudly and triumphantly. If the Orc is…

A: frequency of sound emitted by orc (f) = 377 Hz Speed of orc = 9.3 msSpeed of sound = 359 Hzfrequency…

Q: You stand by the railroad tracks as a train passes by. You hear a 1 000-Hz frequency when the train…

A: Velocity of sound = 340m/s Frequency when train approaches =1000Hz Frequency when train goes away…

Q: Two trains on separate tracks move toward one another. Train 1 has a speed of 100 km/h, train 2 a…

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Q: A man is standing at a railroad crossing for a track that runs east and west. As he faces the track,…

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Q: A robber is moving away from a police officer at a rate of 4.6m/s. The police officer is trying to…

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Q: What is the frequency heard by a person driving at 54 km/h towards a factory whistle that is blowing…

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Q: An observer is standing stationary in air moving at a speed of 2m/s. A source of frequency 20Hz is…

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Q: Two automobiles are equipped with the same single-frequency horn. When one is at rest and the other…

A: Given data The velocity of the first automobile is given as v = 15 m/s. The beat frequency is given…

Q: A driver travels south on a highway at a speed of 25 m/s. A police car, driving south at a speed of…

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Q: Two vehicles are driving, in the same direction, down a highway at 100 km/h. A passenger in the…

A: Given: The actual frequency is 1000 Hz. The speed of the vehicle is 100 km/h in same direction.

Q: A train is travelling at a speed of 120kph toward an observer biking along the side of the rail…

A: Given,Speed of the train, vs = 120 kphspeed of the bike, vo = 40 kphfrequency of the signal, v = 500…

Q: Two trains A and B, beep simultaneously with a frequency of 392 Hz. Train A is in rest and train B…

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Q: A jogger runs at 10 m/s, and is trailed by a hornet moving at 0.7 m/s and emitting a frequency of…

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Q: The frequency of a police car’s siren is 1 500 Hz. What is frequency does a listener hear if the…

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Q: A train approaches a station and sounds its horn which has a natural frequency of 150 Hz. The train…

A: Given: natural frequency f = 150 Hz speed of train v = 40 m/s speed of sound in air s=340 m/s

Q: alk, you hear a frequency of 570 Hz from the siren of an approaching ambulance. After the ambulance…

A: The frequency of the  siren of an approaching ambulance, when you  standing at a crosswalk  f1 = 570…

Q: A car is moving at a rate of 50m/s when suddenly the driver hit the horn that emits 20000Hz…

A: the frequency observed= fo  new frequency due to doppler effect is given by: fo=v+vov+vsfs v=speed…

Q: You are driving along a highway at 35 m/s when you hear the siren of a police car approaching you…

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Q: The siren of a police at rest emits at frequency of 1500 Hz. Suppose you are standing on the side of…

A: Given: The frequency of the source is 1500 Hz. The speed of the car is 10 m/s toward the observer.…

Q: While running on the sidewalk at 5.2m/s, you hear an ambulance approaching you from behind. It is…

A: The observed frequency (fo) can be found using the Doppler effect formula, fo=fsv+v0v+vs fs is the…