Wei is standing on a platform when an approaching XPT train sounds its horn. The frequency of the horn is 500Hz and the train is travelling at 126km h- 1. What is the frequency of the horn as heard by Wei? (Assume the speed of sound in air is 340ms- 1.)

Q: A French submarine and a U.S. submarine move toward each other during maneuvers in motionless water…

A: Given, speed of french submrine vF speed of us submrine vUS The French sub sends out frequency f…

Q: The horn of a train has a frequency of 375Hz. If the train is moving away from you at 38m/x, then…

A: Using Doppler effect, when the source is moving away from the person,

Q: The warning tag on a lawn mower states that it produces noise at a level of 95.0 dB. What is this in…

A:

Q: When poked by a spear, an operatic soprano lets out a 1083 Hz shriek. What is its wavelength (in m)…

A: Given that  f=1083 Hz speed of sound (v)=345 m/s  wavelength (λ)=?

Q: (a) What frequency is received by a person watching an oncoming ambulance moving at 130 km/h and…

A: The person (observer) is standing and watching an oncoming ambulance (a) The frequency heard by the…

Q: In this problem take the speed of sound to be 348 m/s. A. How fast, in meters per second, does an…

A: Given: speed of sound, v = 348 m/s

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

A:

Q: You are in a car moving at 90 km/h and you see someone at the side of the highway. You use your horn…

A:

Q: What frequency is received by a mouse just before being dispatched by a hawk flying at it at 25.0…

A:

Q: A fire truck emits a sound with frequency of 775Hz a. What is the frequency detected by stationary…

A: Doppler effect is the change in frequency of a wave due to relative motion of the observer and the…

Q: A car traveling north at 21 m>s sounds its 480-Hz horn. A bicyclist travels south on thesame road…

A: The bicyclist is moving towards the car. It is given that, vs=343 m/sfo=480 Hzvc=21 m/svb=6.7 m/s

Q: The whistle of a factory is sounding with a frequency of 700 Hz. (a) What frequency will be heard by…

A: According to Doppler         f' = f V±VoV± Vsf' = observed frcquencyf  = Actual frcquencyV = speed…

Q: What is the frequency heard by a person driving at 76 mi/h directly towards toward a factory whistle…

A: Given: The speed with which the person (the observer) is driving directly towards the factory: vo =…

Q: A bird is flying directly toward a stationary bird-watcher and emits a frequency of 1175 Hz. The…

A:

Q: an ultrasonic scan uses the echo waves coming from something moving inside the body and the waves…

A: In an ultrasound scan, we can calculate the beat frequency using the Doppler effect formula for…

Q: A police car approaches the wall with speed of v= 35 m/s while emitting sound with frequency of…

A:

Q: The security alaram on a parked car goes off and produces a frequency of 1080 Hz. The speed of sound…

A:

Q: You are traveling at 19m/s while a vehicle with a siren approaches you from behind at 29m/s. You…

A:

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

A:

Q: A police car is driving away from you with its siren sounding. The car is going 25.0 m/s, and the…

A: The source is moving away from the observer So the perceived frequency is less than the 1000 Hz

Q: The siren of a policy car at rest emits a frequency of 1600 Hz. What frequency do you detect if you…

A: The frequency of sound emitted by the source (policy car) is given as, f  = 1600 Hz The speed of…

Q: The speed of sound in air is given as 340 m/s. What is the wave length of a 318 frequency wave?

A:

Q: truck is moving at 33 m/s, and a car in front of the truck is moving in the same direction at 43…

A: Speed of source = vs = 33 m/s Speed of observer vo = 43 m/s Original frequency = 193 Hz

Q: What frequency is received by a person watching an on coming ambulance moving at 10 Km/h and…

A:

Q: how much time does it take for you to complete 12 dribbles?

A:

Q: A passenger on a train approaching a station a 29 m/s hears a bell ringing in the station. Take the…

A:

Q: If the wind were blowing at 25.0m/s in the same direction you are driving, what frequency would you…

A: This is the case of apparent frequency i.e frequency received by the observer is not the original…

Q: (a) What frequency is received by a person watching an oncoming ambulance moving at 115 km/h and…

A:

Q: Early Doppler shift experiments were conducted using a band playing music on a train. A trumpet…

A: The frequency of the source (trumpet), fs=320 Hz   The frequency observed by the stationary…

Q: (a) At an air show a jet flies directly toward the stands at a speed of 1200 km/h, emitting a…

A:

Q: At rest, a car’s horn sounds at a frequency of 550Hz. When the horn is sounded, while the car is…

A: f0 = 550 Hz Speed of cyclist , V = 8.5 m/s frequency overloads ,  λ = 575 Hz  To find = a) Speed of…

Q: An ambulance with a siren emitting a whine at 1750 Hz overtakes and passes a cyclist pedaling a bike…

A: Given Source frequency fsource = 1750 Hz Observed frequency fobs = 1739 Observer velocity vobs    =…

Q: (a) What frequency is received by a person watching an oncoming ambulance moving at 105 km/h and…

A: Given data The velocity of the ambulance is given as va = 105 km/h. The frequency of the siren is f…

Q: A train approaches a crossing at a velocity of 102 m/s. It sounds its horn, which has a frequency of…

A: velocity of train vs = 102 m/sfrequency f = 400Hzspeed of sound v =343 m/s

Q: A fire truck emits a sound with the frequency of 775Hz.(a) what is the frequency detected by a…

A: Doppler-shifted frequency when source approaches the observer at rest. f'=fvv-vsource=775 Hz343…

Shock Waves

Shock waves are common in continuum mechanics, and their dominance is attributable to the fact that they are stronger (or even less) compressible. Substantial perturbations propagated as sudden dynamic changes of a compressible medium supersonically. Shock waves are all around us in our daily lives. Lightning, earthquakes, volcanic eruptions, and meteorite impact all produce them in nature. Even the earth, which is protected by its magnetic field, generates a shock wave as in solar wind that travels around 20 Earth radiuses. These shock waves might be either constant, linked to the body, or unsteady, i.e., moving around with time. All of the shocks mentioned above can be damaging, so precautions must be taken to reduce their impact.