Concept explainers
(a)
To calculate: The frequency that can be detected for the given value.
(a)
Answer to Problem 49P
Explanation of Solution
Given:
Fire engine’s siren frequency
A wave moves with a speed
Formula used:
Write the expression for apparent frequency.
Where,
Calculation:
Calculations are based on the person, moving towards or away from the fire engine.
In this case, considering a person moving towards the fire engine and the fire engine actual frequency of a siren is
So, consider negative x- direction,
The source frequency
Apparent frequency,
Conclusion:
Therefore, frequency that can be detected is
(b)
To calculate: The frequency that can be detected for the given value.
(b)
Answer to Problem 49P
Explanation of Solution
Given:
Fire engine’s siren frequency
A wave moves with a speed
Formula used:
Write the apparent frequency.
Calculation:
The calculations are based on the person, moving towards or away from the fire engine.
In this case, considering a person moving towards the fire engine and the fire engine actual frequency of a siren is
So, consider positive x -direction,
The source frequency ( vs ) = 0
Apparent frequency,
From above expression,
Conclusion:
Therefore, the frequency that can be detected is
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