A stationary source emits sound waves of frequency fand wavelength A that travel through a gas with speed v. If the type of gas is changed so that the wave now moves with speed 2v, what will be the frequency and wavelength of the new wave respectively? new frequency: f new wavelength: 2A new frequency: f new wavelength: 0.5A new frequency: V2f new wavelength: /2A new frequency: 0.5f new wavelength: A new frequency: 2f new wavelength:A

You are driving west on a highway at 2o m/sec. A police car is traveling toward you moving east. The police siren is blaring loudly and your perfect pitch identifies the tone frequency as 600 HZ but you know that the standard siren frequency is 500 HZ. (use 340 m/sec as the speed of sound in the air) How fast must the police car be moving to give this much change in the perceived frequency? After the police car goes by you if you maintain your respective speeds and direction, what will be the frequency you here as he recedes from you?

You are hiking along a trail in a wide, dry canyon where the outdoor temperature is T=28.5 degrees celsius. To determine how far you are away from the canyon wall you yell "hello" and hear the echo t=3.05s later.   a) calculate the speed of sound in the valley in meters per second, assuming the speed at 0 degrees celsius is 332 m/s b) how far are you from the canyon wall, in meters? c) if you stood at the same point on a cold morning where the temperature was T2= -1.5 degrees C, how long would it have taken for you to hear the echo, in seconds?

A duck bobs up and down on a lake. The waves that pass under the duck have a wavelength of 3.5 m, and are moving at a speed of 5.6 m/s. What is the frequency of the waves?