Answer:
631.7 Hz
Explanation:
The Doppler effect is a phenomenon that occurs when there is relative motion between an observer and a source of a wave. When this occurs, the is a change in the apparent frequency of the wave, as observed by the observer.
In particular, the new apparent frequency can be calculated as:
[tex]f'=\frac{v\pm v_o}{v\pm v_s}f[/tex]
where
f is the real frequency
f' is the apparent frequency
v is the speed of the wave
[tex]v_o[/tex] is the velocity of the observer (positive if the observer is moving towards the source, negative if moving away)
[tex]v_s[/tex] is the velocity of the source (negative if the source is moving towards the observer, positive if moving away)
In this problem:
v = 340.6 m/s is the speed of the sound wave
f = 600 Hz is the real frequency of the sound
[tex]v_o = +18 m/s[/tex] is the velocity of the person
[tex]v_s=0[/tex] is the velocity of the source
Substituting, we find:
[tex]f'=\frac{340.6+18}{340.6}(600)=631.7 Hz[/tex]
