BuyFindarrow_forward

College Physics

1st Edition
Paul Peter Urone + 1 other
ISBN: 9781938168000

Solutions

Chapter
Section
BuyFindarrow_forward

College Physics

1st Edition
Paul Peter Urone + 1 other
ISBN: 9781938168000
Textbook Problem

A highway patrol officer uses a device that measures the speed of vehicles by bouncing radar off them and measuring the Doppler shift. The outgoing radar has a frequency of 100 GHz and the returning echo has a frequency 15.0 kHz higher. What is the velocity of the vehicle? Note that there are two Doppler shifts in echoes. Be certain not to round off until the end of the problem, because the effect is small.

To determine

The velocity of the vehicle.

Explanation

Given info:

  • The frequency of outgoing radar is 100GHz.
  • Convert giga-hertz into hertz.

      100GHz=100GHz×109Hz1GHz=1011Hz

  • The frequency of the returning echo is 15kHz.
  • Convert kilo-hertz into hertz.

      15kHz=15kHz×103Hz1kHz=15000Hz

Formula used:

The frequency observed by the car is,

  foc=fs1+uc1uc

Frequency observed by the detector,

  f0=foc1+uc1ucf0=fs1+uc1uc1+uc1uc=fs(1+uc1uc)     Equation-1

Frequency of the echo,

  Δf=fofsΔf=fs(

Still sussing out bartleby?

Check out a sample textbook solution.

See a sample solution

The Solution to Your Study Problems

Bartleby provides explanations to thousands of textbook problems written by our experts, many with advanced degrees!

Get Started

Additional Science Solutions

Find more solutions based on key concepts

Show solutions add

In what ways do melting glaciers become a problem?

Fundamentals of Physical Geography

Which of the following is a physical consequence of fasting? a. loss of lean body tissues b. lasting weight los...

Nutrition: Concepts and Controversies - Standalone book (MindTap Course List)

Where would you go on Earth to have a celestial pole at your zenith?

Horizons: Exploring the Universe (MindTap Course List)

What is the defining feature of a synovial joint?

Human Biology (MindTap Course List)