1. In still air, with a speed of sound, v = 343.0 m / s, a source of sound A is moving directly toward a reflecting surface B. Reflecting surface B is moving directly away from source A. The speed of A is v, =162 km / h and the speed of B is V = 86.4 km /h. Sound source A emits waves of А frequency f, =1200.0 Hz in the frame of A. а. What is the frequency heard by a detector mounted on and moving with reflecting surface B, Bd What is the frequency of the reflected wave as heard by a detector mounted on and moving with sound source A, f4? b.
1. In still air, with a speed of sound, v = 343.0 m / s, a source of sound A is moving directly toward a reflecting surface B. Reflecting surface B is moving directly away from source A. The speed of A is v, =162 km / h and the speed of B is V = 86.4 km /h. Sound source A emits waves of А frequency f, =1200.0 Hz in the frame of A. а. What is the frequency heard by a detector mounted on and moving with reflecting surface B, Bd What is the frequency of the reflected wave as heard by a detector mounted on and moving with sound source A, f4? b.
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Transcribed Image Text:1.
In still air, with a speed of sound, v= 343.0m/s, a source of sound A is moving directly
toward a reflecting surface B. Reflecting surface B is moving directly away from source A. The speed
of A is v, =162 km / h and the speed of B is VR = 86.4 km / h. Sound source A emits waves of
frequency f, =1200.0 Hz in the frame of A.
а.
What is the frequency heard by a detector mounted on and moving with reflecting surface B,
Bd
b. What is the frequency of the reflected wave as heard by a detector mounted on and moving
with sound source A, JAd ?
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