A train approaches a platform at a speed of 22 km/h while it blows its whistle. Someone on the platform hears the whistle at 342 Hz. Calculate the actual frequency of the whistle. (speed of sound = 343 m/s)

Q: You are driving along a highway at 32 m/s when you hear the siren of an emergency vehicle traveling…

A: Speed of observer is When source and observer approaching each other then the frequency observed by…

Q: A motorcyclist is traveling 31 m/s due west relative the ground. A fire truck is traveling on the…

A: We are given velocity of motorcyclist and truck. We are given frequency of the sound. We are also…

Q: An eagle flying at 28 m/s emits a cry whose frequency is 370 Hz. A blackbird is moving in the same…

A: Given:-  The velocity of the eagle fly is v = 28 m/s  The frequency of the cry is f = 370 Hz.  The…

Q: An organ pipe is open at both ends. It is producing sound at its second harmonic, the frequency of…

A: We have an open organ pipe which is producing a sound of frequency f=318.1 Hz at its second harmonic…

Q: A police car is approaching you at 26 m/s while you are at rest. The rest frequency of the siren is…

A: Given data:  Source is approaching to observer  Observer at rest  Velocity of the source (vs) = 26…

Q: A bat can detect small objects, such as an insect, whose size is approximately equal to one…

A: Given data The frequency is given as f = 9.01 x 104 Hz. The speed of the sound in the air is given…

Q: An instrument has a lowest frequency of 40 Hz. The string has mass per unit length of 0.015 kg/m.…

A: Step 1* Lowest frequency of instrument f0 = 40 Hz* Mass per unit length of string u = 0.015 kg.m*…

Q: Two trains on separate tracks move toward each other. Train 1 has a speed of 130 km/h; train 2, a…

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Q: Problem 10:  A student knows that an ambulance siren has a frequency of fs = 395 Hz. He measures,…

A: Sound waves are longitudinal waves. Their direction of propagation is parallel to the direction of…

Q: A submarine is lying motionless underwater and detects an underwater sound coming from a moving…

A: The formula of the Doppler's effect is  f'=v - vov - vsf where, v is the speed of sound, vo is the…

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: 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: The speed of sound in air is measured at 335 m/s. The frequency of the sound at the source is 375…

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Q: A motorcyclist is traveling at 23 m/s away from a police car at rest. If the policeman blows his…

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Q: For an ecology project, Maria is recording some ambient sounds in the woods. A hawk emits a cry with…

A: Given data:  Frequency (f) = 8.06×102 Hz Speed of source (vs) = 16 m/s, towards observer The…

Q: 49.4-Hz sound wave is barely audible at a sound intensity level of 60.0 dB. The density of air at…

A: (given) Speed (v) of sound in air at 20.0°C = 343 m/s             Density (ρ) of air at 20.0°C =…

Q: You are in auto traveling at 44 m/s toward a pole-mounted warning siren. If the siren's frequency is…

A: In this case, the source of the frequency is fixed and the observer is approaching the source, with…

Q: A siren emitting a frequency of 446 Hz is moving away from a person with a velocity of 105 km/h.…

A: Given Data : The frequency of the siren is given as fs = 446 Hz. The velocity of the siren with…

Q: Scientists in a laboratory produce a sound wave in a simulated environment (air) with a velocity of…

A: We know that   v = 331m/s + 0.6m/s/C * T     here T is in celcius

Q: A smoke alarm emits a signal of frequency 680 Hz.  The alarm goes off, and someone becomes so…

A: Given data The frequency emitted by the smoke alarm is f = 680 Hz. The falling speed of an alarm is…

Q: A sound wave has a frequency of 632 Hz in air and a wavelength of 0.51 m. What is the temperature of…

A: Given, frequency = 632 Hz wavelength = 0.51 m We know, c is the speed of sound

Q: police car siren has a frequency of 850 Hz. If you hear this siren to have a frequency that is…

A: Given that            Car siren has a frequency of (fsource) = 850Hz            The frequency that…

Q: A truck moving with a speed of 31.8 m/s sounds a 136 Hz horn. What frequency is heard by an observer…

A: The observer status near the tracks is the receiver of the sound wave, and because the truck is…

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: An fıre truck races down a road at 75 km/h with its siren blazing. The siren has a frequency of 580…

A: Calculate the speed of sound in air at T=22°C. v=331 m/s1+T273 °C=331 m/s1+22 °C273 °C≅344 m/s Here,…

Q: Donny and Shaojia are driving along a highway at 30.0 m/s when they hear the siren of a police car…

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Q: You see an approaching train while standing on a railway platform. It blows its whistle, which you…

A: Given: Frequency of the source train: fs=500 [Hz] Frequency heard by stationery observer: f0=100…

Q: An ambulance with a siren emitting a frequency of 1600Hz overtakes and passes a cyclist pedaling a…

A: Given: The original frequency (fs) of the ambulance is 1600 Hz. The frequency (fo) observed by the…

Q: A bird is flying directly toward a stationary bird-watcher and emits a frequency of 1390 Hz. The…

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Q: The driver of a car traveling 27.0 m/s sounds his horn as he approaches an intersection. If the horn…

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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: A train passes by a little boy at the depot.As it moves away from the boy at 65m/s, the whistle…

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Q: At a rock concert, the sound intensity 1.0 m in front of the bank of loudspeakers is 0.10 W/m2. A…

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Q: Two people are moving relative to each other. One person is blowing a precision whistle that has a…

A: Given:         frequency of the whistle i.e. source frequency f = 392 Hz         Frequency observed…

Q: he amplitude of a sound wave is measured in terms of its maximum gauge pressure. By what factor does…

A: Given: The sound level is ∆β=36 dB. The expression for sound level is: ∆β=10 dBlog10A2A12 Here, A1…

Q: alarm in a parked car is going off at a frequency of 855.2 Hz. The speed of sound is 343 m/s. As you…

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Q: An eagle flying at 28 m/s emits a cry whose frequency is 370 Hz. A blackbird is moving in the same…

A:

Q: What is the first overtone frequency for an organ pipe 2.00 m in length, closed at one end? The…

A: Given Length of closed organ pipe = L = 2.00 m Speed of sound = v = 344 m/s We have to calculate…

Q: A car moving with a speed of 27 m/s sounds its siren with a frequency of 1208 Hz. A motorcyclist…

A: The wall acts like a mirror and the reflected sound is equivalent to another car moving left with…

Q: Two trains on separate tracks move toward each other. Train 1 has a speed of 112 km/h; train 2, a…

A:

Q: Horseshoe bats use the Doppler effect to determine their location. A Horseshoe bat flies toward a…

A: Given:        Speed of Horseshoe batv= 15 m/s        Frequency of emitted sound f= 19.6 kHz…

Q: The driver of a car traveling 24.0 m/s sounds his horn as he approaches an intersection. If the horn…

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