# Review. A student holds a tuning fork oscillating at 256 Hz. He walks toward a wall at a constant speed of 1.33 m/s. (a) What beat frequency does he observe between the tuning fork and its echo? (b) How fast must he walk away from the wall to observe a beat frequency of 5.00 Hz?

### Physics for Scientists and Enginee...

10th Edition
Raymond A. Serway + 1 other
Publisher: Cengage Learning
ISBN: 9781337553278

Chapter
Section

### Physics for Scientists and Enginee...

10th Edition
Raymond A. Serway + 1 other
Publisher: Cengage Learning
ISBN: 9781337553278
Chapter 17, Problem 31P
Textbook Problem
487 views

## Review. A student holds a tuning fork oscillating at 256 Hz. He walks toward a wall at a constant speed of 1.33 m/s. (a) What beat frequency does he observe between the tuning fork and its echo? (b) How fast must he walk away from the wall to observe a beat frequency of 5.00 Hz?

(a)

To determine
The Beat frequency that student observe between tuning fork and echo.

### Explanation of Solution

Given information: The Oscillating frequency is 256Hz , the speed of the student is 1.33m/s and the speed of the sound is 343m/s .

Write the expression for frequency received by wall is,

f=fw(vvvs)

fw=f(vvsv) (1)

Here,

v is the velocity of sound.

vs is the constant speed.

fw is the frequency received by the wall.

f is the oscillating frequency.

Echo frequency received by the observer

fe=f(vs+vv) (2)

Here,

fe is the echo frequency received by the observer.

Write the alternate expression for beat frequency from equation (1) and (2).

Δf=fefw

Substitute f(v+vs)v for fe and f(vvs)v for fw in above expression

(b)

To determine
The speed of the student.

### 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

Find more solutions based on key concepts