In: Physics
A bird is flying directly toward a stationary bird-watcher and emits a frequency of 1380 Hz. The bird-watcher, however, hears a frequency of 1450 Hz. What is the speed of the bird, expressed as a percentage of the speed of sound?
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A bird is flying directly toward a stationary bird-watcher and emits a frequency of 1100 Hz. The bird-watcher, however, hears a frequency of 1130 Hz. What is the speed of the bird, expressed as a percentage of the speed of sound?
Speed of sound in air (v) 343m/s
Source:
Frequency(fs): 1100 Hz
Velocity(vs): ?
Stationary:
Frequency(fl): 1130 Hz
Velocty(vl): 0 m/s
Applying the Doppler effect:
Since the source is approaching towardsthe listener, the velocity of the source isnegative.
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ofspeed of sound in air