(a) Explanation Given Info: The frequency heard by the engineer is 775 Hz , the frequency the train generates is 650 Hz . The speed of the sound in air is 343 m / s . The expression for the frequency for the moving train is, f ′ = f ( v v − u ) (1) Here, f is the frequency train generates. u is the speed of the train. v is the speed of the sound in the air. From the Doppler’s formula the frequency of the sound reflected from cliff and heard by the engineer is, f ′ ′ = f ′ ( v + u v ) Rearrange the above equation for f ′ . f ′ = f ′ ′ ( v + u v ) Substitute f ′ ′ ( v + u v ) for f ′ in the equation (1). f ′ ′ ( v + u v ) = f ( v v − u ) Rearrange the above equation (b) To determine The speed of the train.

Physics, Books a la Carte Edition (5th Edition)

5th Edition

ISBN: 9780134020853

Author: James S. Walker

Publisher: PEARSON

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Equation of Waves

Wave is an oscillation or disturbance traveling in a medium. It performs the transportation of energy but does not carry any matter. This motion of waves will transport fuel in a medium without permanent transfer of mass (particle).

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Chapter 14, Problem 111PP

(a)

To determine

Whether the speed of the train is greater than, less than or equal to 21.2 m/s .

(b)

To determine

The speed of the train.

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Chapter 14, Problem 110PP

Chapter 14, Problem 112PP

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Chapter 14 Solutions

Physics, Books a la Carte Edition (5th Edition)

Ch. 14.1 - Rank the following systems in order of increasing...Ch. 14.2 - Suppose the tension in a string is doubled, its...Ch. 14.3 - A particular harmonic wave is described by the...Ch. 14.4 - Which is faster: wave 1 in medium 1 with a...Ch. 14.5 - Enhance Your Understanding (Answers given at the...Ch. 14.6 - Observer 1 approaches a stationary 1000-Hz source...Ch. 14.7 - Prob. 7EYU Ch. 14.8 - When a string oscillates with the standing wave...Ch. 14.9 - Rank the following systems in order of increasing...Ch. 14 - A long nail has been driven halfway into the side...

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Whether the speed of the train is greater than, less than or equal to 21.2 m / s .

Solution Summary: The author explains that the speed of the train is greater than 21.2m/ s.

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Whether the speed of the train is greater than, less than or equal to 21.2 m/s .

The speed of the train.

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Chapter 14 Solutions