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.)

If you dribble a basketball with a frequency of 1.80 HzHz, how much time does it take for you to complete 12 dribbles?

A passenger on a train approaching a station a 29 m/s hears a bell ringing in the station. Take the speed of sound to be 343 m/s.   the passenger hears a bell at a frequency of 361 Hz. What frequency, in hertz, do the people waiting on the station platform hear?

(a) What frequency is received by a person watching an oncoming ambulance moving at 115 km/h and emitting a steady 833 Hz sound from its siren? The speed of sound on this day is 345 m/s.(b) What frequency does she receive after the ambulance has passed?

Early Doppler shift experiments were conducted using a band playing music on a train. A trumpet player on a moving railroad flatcar plays a 320-Hz note. The sound waves heard by a stationary observer on a train platform hears a frequency of 350 Hz. What is the flatcar’s speed in mph? The temperature of the air is TC = 22°C .

A water wave has a frequency of 9.0 Hz and a wavelenght of 5.0m. (a)  What is the period (in seconds) of these waves? (b) What is the wave velocity in m/s?

At rest, a car’s horn sounds at a frequency of 550Hz. When the horn is sounded, while the car is moving down a street, a bicyclist moving at 8.50m/s in the direction opposite to the car hears a frequency of 575Hz. (a) What is the speed of the car? (b) If the cyclist slows down to 2.50m/s before passing the car, what is the new frequency detected by the cyclist? Assume that the car moves with the same speed, and that the speed of sound in air is 343m/s.

(a) What frequency is received by a person watching an oncoming ambulance moving at 105 km/h and emitting a steady 713 Hz sound from its siren? The speed of sound on this day is 345 m/s. (b) What frequency does she receive after the ambulance has passed?

An ambulance with a siren emitting a frequency of 1600HZ overtakes and passes a cyclist pedaling a bike at 4 m/s. After being passed, the cyclist hears a frequency of 1590HZ. How fast is the ambulance moving? Temperature of air is 25°C. 2.

Person A is holding a speaker which is emitting sound of frequency of 520 Hz and passes person B. What is the maximum frequency heard by person B if the velocity of person A is 2 m-s'.