physics

At the Indianapolis 500, you can measure the speed of cars just by listening to the difference in pitch of the engine noise between approaching and receding cars. Suppose the sound of a certain car drops by a factor of 2.40 as it goes by on the straightaway. How fast is it going? (assume speed of sound is 343 m/s).
I don't know where to start. I tried setting frequency2 = x(frequency1), where x=-2.4, but I don't know. Does anyone have suggestions? Thanks

I think I would use the doppler formula.

  1. 👍 0
  2. 👎 0
  3. 👁 105
asked by tasha
  1. how?

    1. 👍 0
    2. 👎 0

Respond to this Question

First Name

Your Response

Similar Questions

  1. physics

    At the Indianapolis 500, you can measure the speed of cars just by listening to the difference in pitch of the engine noise between approaching and receding cars. Suppose the sound of a certain car drops by a factor of 2.30 as it

    asked by steve on April 1, 2011
  2. science

    What is the difference in pitch and volme as race cars pass by the cmeras at the Indianapolis 500?

    asked by April on December 6, 2012
  3. physics

    computer-controlled display screens provide drivers in the Indianapolis 500 with a variety of information about how their cars are performing. for instance, as ac car is going through a turn, a speed of 221 mi/h (98.8m/s) and

    asked by bob on October 27, 2016
  4. physics

    Computer-controlled display screens provide drivers in the Indianapolis 500 with a variety of information about how their cars are performing. For instance, as a car is going through a turn, a speed of 87.5 m/s and centripetal

    asked by Tyler on January 26, 2017
  5. Physics

    Computer-controlled display screens provide drivers in the Indianapolis 500 with a variety of information about how their cars are performing. For instance, as a car is going through a turn, a speed of 201 mi/h (89.847 m/s) and a

    asked by Xavier on November 25, 2010
  6. Algebra grade 7

    one day victor was riding in the car with his dad and saw a sign that read 500 km to Indianapolis. about how many hours did it take to get to Indianapolis if the car was traveling at 60 mph. 1 mi = 1.61 km

    asked by randomchik on September 29, 2012
  7. Speech

    Listening to your friend sincerely as they tell you about their day ( empathic listening)? Not anderstanding because of accent ( cultural barrier)? Take notes in class and studying then so you can paraphrase the information for a

    asked by Darcy on February 13, 2013
  8. Speech 09

    I'm posting this question again I really need to know if i am right or wrong please help Place the correct letter next to the item that matches it. A. Physical Barrier B. Mental Barrier C. Cultural Barrier D. Empathic Listening E.

    asked by Darcy on February 14, 2013
  9. Physics

    A car moves in a circular path at 15 mph. Which of the following statements about the cars motion would be correct? a. The cars acceleration is constant. b. The cars velocity is constant. c. The cars speed is constant. d. The cars

    asked by Lisa on September 24, 2011
  10. maths

    the police officer also gathered data on the speedsx, in kilometers per hour (km/h) of some cars as they drove down the hill towards her car. the speed limit is 50 km/h. Analysis of the results showed that the speeds of cars were

    asked by kate on August 26, 2007

More Similar Questions