callmelako017
Answered

Get the answers you need at Westonci.ca, where our expert community is dedicated to providing you with accurate information. Get precise and detailed answers to your questions from a knowledgeable community of experts on our Q&A platform. Get quick and reliable solutions to your questions from a community of experienced experts on our platform.

Hi, Can anyone help me? I don't understand.

A car horn has a frequency of 448 Hz when the car is stationary. If the car approaches a stationary recorder at a speed of 19.0 m/s, what frequency does the device record if the temperature is 20°C? What frequency does the device record after the car passes by?

**SHOW CALCULATIONS, PLEASE!

Sagot :

onyebuchinnaji

The frequency recorded by the device after the car passes by at the given speed is 474.27 Hz.

Observed frequency recorded by the device

The frequency recorded by the device is determined by using the following formula for doppler effect.

[tex]f_o = f_s(\frac{v + v_0}{v- v_s} )[/tex]

where;

  • v is speed of sound at 20°C = 343 m/s
    vo is speed of the observer = 0
  • vs is the speed of the sound towards the observer = 19 m/s
  • fs is the source frequency
  • fo is the observed frequency

[tex]f_o = 448(\frac{343 + 0}{343-19} )\\\\f_0 = 474.27 \ Hz[/tex]

Thus, the frequency recorded by the device after the car passes by at the given speed is 474.27 Hz.

Learn more about frequency here: https://brainly.com/question/10728818

#SPJ1

Thank you for visiting. Our goal is to provide the most accurate answers for all your informational needs. Come back soon. Thank you for visiting. Our goal is to provide the most accurate answers for all your informational needs. Come back soon. Your questions are important to us at Westonci.ca. Visit again for expert answers and reliable information.