1. A source moving with a speed 37 m/s, emits a sound wave with a frequency...
1. A source moving with a speed 37 m/s, emits a sound wave with a frequency f = 377 Hz. Determine the frequency detected by a stationary observer if the speed of sound is v = 343 m/s and the source is moving towards the observer.
2.A stationary source, emits a sound wave with a frequency f = 428 Hz. Determine the frequency detected by an observer moving towards the source with a speed v = 43 m/s, if the speed of sound is v = 344 m/s.
3.A source moving with a speed equal to 48 m/s, emits a sound wave with a frequency f = 457 Hz. Determine the frequency detected by a stationary observer if the speed of sound is v = 332 m/s and the source is moving away from the observer.
Homework Answers
1.)
Doppler's effect:
frequency observed = f [(v+vo))/(v-vs)]
Vo = 0
Vs = 37m/s
v = 343m/s
f=377Hz
so, frequency observed = 377 x (343/(343-37)) =422.58 Hz
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