Suppose that two cars are moving towards one another, and each is traveling at a speed of . If one of the cars begins to beep its horn at a frequency of , what is the wavelength perceived by the other car?

A certain shade of blue light has a laboratory rest wavelength of . The same shade of blue light is emitted from a newly discovered galaxy at a wavelength of . Using this information, what can we tell about this newly discovered galaxy?

A bat is flying towards a stationary wall at a constant speed of . The bat emits a sound of towards the wall, which is then reflected back at the bat. If the speed of sound in air is , what is the frequency of sound that the bat experiences?

Suppose a car moves at and produces a honk. A runner running at approaches the car. About what frequency does the runner hear?

If a music box produces a tone of as a boy is running towards the music box at , what is the frequency the boy hears?

A motorcycle is approaching at . Normally, the exhaust note has frequency . Determine the perceived frequency if the speed of sound is .

A train is receding at with it's horn on. Normally, the horn has frequency . Determine the perceived frequency if the speed of sound is .

A rocket ship traveling towards an observer flashes a light, . How fast would it have to be traveling for the wavelength to be cut to one third it's initial value?

A motorcycle is receding at . Normally, the exhaust note has frequency . Determine the perceived frequency if the speed of sound is .

A train is receding at with it's horn on. Normally, the siren has frequency . Determine the perceived frequency if the speed of sound is .