A В a) An ambulance moving with a speed of Vs m/s, produces a siren of frequency 528HZ, approaches an observer B, who is moving in the opposite direction with a speed of 26.15 m/s. If the frequency heard by the observer B is 664 Hz, and the speed of the sound is 332 m/s, calculate the Speed of the ambulance V, in m/s b) If now, the observer A is receding from the ambulance with the same speed as the observer B, calculate the Frequency of the sound heard by the observer A, in hertz :

wave, travelinp vith a speed f wavelength of f this of 3.50%, has 20 cm. Calaulate a the frequency しaue.

A mobile phone network uses microwaves to transmit signals between mobile phones and masts. The microwaves have a frequency of 1.5GHZ and travel at a speed of 300000000m/s. The maximum distance that a phone can be from a mast and still receive a signal is 35km. Use an equation to find the wavelength of microwaves

An emergency vehicle with its siren turned on at a frequency of 790HZ, moves away from a stat ionary observer at a speed 25m/s. What frequency does the observer hear? 698 Hz O 757 Hz 735 Hz 750 Hz

1. In still air, with a speed of sound, v= 343.0m/s, a source of sound A is moving directly toward a reflecting surface B. Reflecting surface B is moving directly away from source A. The speed of A is v, =162 km / h and the speed of B is VR = 86.4 km / h. Sound source A emits waves of frequency f, =1200.0 Hz in the frame of A. а. What is the frequency heard by a detector mounted on and moving with reflecting surface B, Bd b. What is the frequency of the reflected wave as heard by a detector mounted on and moving with sound source A, JAd ?

A spacecraft transmits a microwave signal with a wavelength of 1.25 cm.  If the wavelength of the signal received on Earth is 1.255 cm, how fast is the spacecraft moving away from Earth?

Imagine u are  hiking along а trail wide, dryr canyon where thec outdoor temperature is T=25° C determine how, far you aret away fom the canyon wall, you yell:  Bye" and hear the echo t= 2.45 s later. Then calculate the speed of that sound in m/s  if the speed at 0° C is 330 m/s .  Then how far are u from the canyon wall in m?  If u stood at the same point on a cold day were T2 = -7.5 °C how long is have taken fou u to hear the echo in s?

then If you stood at the same point on a cold day were T2 = -7.5 °C how long is have taken for you to hear the echo in s?

A spectator at a parade receives an 889 Hz tone from an oncoming trumpeter who is playing an 879 Hz note. At what speed vs, is the musician approaching if the speed of sound is 340  ms?