(a)
To identify: Whether frequency observed by the person increase, decrease or stay the same.
(a)
Answer to Problem 47A
When a whistle shrieks from a railroad locomotive, starting from rest, moving towards the observer, then frequency received increases.
Explanation of Solution
Introduction:
Frequency is inversely proportional to the wavelength
When a railroad locomotive starting from rest moves towards the observer, then whistle shrieks along with it. As the distance between the source and observer decreases, the frequency of the sound in air increases.
Conclusion:
When a whistle blows from a railroad locomotive starting from rest, moving towards the observer, then frequency increases.
(b)
To identify: Whether frequency observed by the person increase, decrease or stay the same.
(b)
Answer to Problem 47A
When a whistle shrieks from a railroad locomotive, starting from rest, moving towards the observer, then wavelength received decreases.
Explanation of Solution
Introduction:
Frequency is inversely proportional to the wavelength
When a railroad locomotive starting from rest moves towards the observer, then whistle shrieks along with it. As the distance between the source and observer decreases, the frequency of the sound in air increases and wavelength of the sound waves decrease.
Conclusion:
When a whistle blows from a railroad locomotive starting from rest, moving towards the observer, then frequency increases and wavelength decreases.
(c)
To identify: Whether the speed of sound observed by the person changes or not.
(c)
Answer to Problem 47A
When a whistle shrieks from a railroad locomotive, starting from rest, moving towards the observer, then the speed of sound in the air in between remain constant.
Explanation of Solution
Introduction:
Frequency is inversely proportional to the wavelength
Here, the speed of sound waves in the air remains constant. As it does not depends on any of such factors like frequency or wavelength of the sound waves. While frequency increases, wavelength decreases, maintaining the constant speed of the sound in the air.
Conclusion:
When a whistle blows from a railroad locomotive, starting from rest, moving towards the observer, then the speed of sound in the air in between remain constant.
Chapter 25 Solutions
Conceptual Physics: The High School Physics Program
Additional Science Textbook Solutions
Sears And Zemansky's University Physics With Modern Physics
College Physics (10th Edition)
Conceptual Physics (12th Edition)
College Physics
College Physics: A Strategic Approach (4th Edition)
Tutorials in Introductory Physics
- College PhysicsPhysicsISBN:9781305952300Author:Raymond A. Serway, Chris VuillePublisher:Cengage LearningUniversity Physics (14th Edition)PhysicsISBN:9780133969290Author:Hugh D. Young, Roger A. FreedmanPublisher:PEARSONIntroduction To Quantum MechanicsPhysicsISBN:9781107189638Author:Griffiths, David J., Schroeter, Darrell F.Publisher:Cambridge University Press
- Physics for Scientists and EngineersPhysicsISBN:9781337553278Author:Raymond A. Serway, John W. JewettPublisher:Cengage LearningLecture- Tutorials for Introductory AstronomyPhysicsISBN:9780321820464Author:Edward E. Prather, Tim P. Slater, Jeff P. Adams, Gina BrissendenPublisher:Addison-WesleyCollege Physics: A Strategic Approach (4th Editio...PhysicsISBN:9780134609034Author:Randall D. Knight (Professor Emeritus), Brian Jones, Stuart FieldPublisher:PEARSON