A siren emitting sound of frequency 1000 Hz approaches a stationary observer at one-half the speed of sound. The observer hears a frequency of
A) 1500 Hz.
B) 1000 Hz
C) 2000 Hz.
D) 500 Hz.
E) none of the above.

Question

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The Answer of A siren emitting sound of frequency 1000 Hz approaches a stationary observer at one-half the speed of sound. The observer hears a frequency of
A) 1500 Hz.
B) 1000 Hz
C) 2000 Hz.
D) 500 Hz.
E) none of the above.

A Siren Emitting Sound of Frequency 1000 Hz Approaches a Stationary