A police car is at a red light. A car behind him foolishly tests his luck and runs the red light. The officer immediately flicks on his siren and begins to chase the car, accelerating at a rate of . The frequency of the siren is 500Hz. If you are standing at the red light, what frequency do you percieve 6 seconds after the police officer began chasing the car?

You are driving your car by a very loud concert and moving at . If the frequency of a particular long note is 740 Hz, what is the frequency of the note you hear as you approach the concert? What is the frequency of the note you hear as you move away from the concert? The speed of sound in air is .

A person showing off their new sound system is driving towards a group of people at a speed of . The group of people is stationary. What is the observed frequency of the sound if the sound emitted by the car has a frequency of 421Hz?

What is the apparent frequency of a wave traveling at a speed and frequency that is moving away from you at a speed , and that you are moving towards at a speed ? Note: in this context is not referring to the speed of light.

You are commuting to work one morning on your bike. You travel at an average rate of . A police car is traveling down the street towards you at a rate of . If the police siren emits a maximum frequency of , what is the maximum frequecny that you here?

An astronomer observing a distant star finds that the frequency of light she is observing is less than she expected. She concludes that there is motion between her telescope and the star. What type of motion would explain the astronomer's observation?

Samira is standing on the corner of Market St. and 20th Ave. A rock band on the back of a flatbed truck drives past her. At the moment she is even with Samira, the lead singer yells at a frequency of . If the truck drives away at a constant velocity of , what is the apparent frequency of the singer to Samira?

An astronomer on Earth looks at a distant star and analyzes the spectral lines for hydrogen from that star. They find the wavelength of hydrogen from the star to be , but the astronomer knows that the wavelength of hydrogen on Earth is . How fast is the distant star moving away from the Earth?

A group of storm chasers has found a tornado that is traveling north at a rate of . The storm chasers are south of the storm, trying to catch up. If they are traveling at a rate of and percieve an average frequency of coming from the storm, what is the actualy frequency of sound that the storm is emitting?

One of your family members has convinced you to participate in a 10k race with them. You are running at a steady pace of . A man who throughouly enjoys running 10k races is behind you with a megaphone, telling jokes, providing encouragement for other racers, and simply enjoying himself a bit too much. If he is traveling at a pace of and his voice has an average frequency of 800Hz, what is the percieved wavelength of sound that you hear?