A bird is flying directly toward a stationary bird-watcher and emits a frequency of 1480 Hz. The bird-watcher, however, hears a frequency of 1510 Hz. What is the speed of the bird, expressed as a percentage of the speed of sound?
A bird is flying directly toward a stationary bird-watcher and emits a frequency of 1480 Hz....
A bird is flying directly toward a stationary bird-watcher and emits a frequency of 1060 Hz. The bird-watcher, however, hears a frequency of 1110 Hz. What is the speed of the bird, expressed as a percentage of the speed of sound?
3. A bat flying toward a wall at 6.0m/s emits a sound at a frequency of 35kHz. What is the frequency of the echo (sound reflected by the wall back to the bat) that the bat hear? Assume the speed of sound to be 343m/s.
A stationary source emits sound with a frequency of 1250 Hz. If the speed of the sound is 343 m/s, what frequency is heard by an observer approaching the source with a speed of 25 m/s? Please show all equations and work in detail. Write clearly please. I always rate and will rate, ty :) <3 Have a great day
019: A source emits sound with a frequency of 1000 Hz. An observer is moving at 160 m/s toward the source, which is stationary. The speed of sound is 340 m/s. The frequency heard by the observers is:
A motorcyclist is moving 24.5 m/s towards a stationary siren, and hears a 894 Hz sound. What is the frequency of the siren when the cyclist is stationary? A motorcyclist is moving 24.5 m/s toward a stationary siren, and hears an 894 Hz sound. What is the frequency of the siren when the cyclist is stationary? (Hint: 894 Hz is the Doppler-shifted frequency.) (Speed of sound 343 m/s) (Unit Hz) nter
An eagle flying at 37 m/s emits a cry whose frequency is 490 Hz. A blackbird is moving in the same direction as the eagle at 13 m/s. (Assume the speed of sound is 343 m/s.) (a) What frequency does the blackbird hear (in Hz) as the eagle approaches the blackbird? Hz (b) What frequency does the blackbird hear (in Hz) after the eagle passes the blackbird? Hz
9. An ambulance truck emits a sound with a frequency of 800 Hz. (the speed of sound in air at 20 Celsius is 343 m/s). (a) What is the frequency detected by a stationary observer if the ambulance truck moving 30 m/s toward the observer? (b) What frequency will b detected if the ambulance is moving 30 m/s away from the observer?
A siren emits a frequency of 2,000 Hz. If an observer hears a frequency of 1,800 Hz, is the siren moving toward or away from him?
A stationary ambulance has stopped at an intersection. The ambulance's siren emits a 628-Hz sound but the driver of a car moving away from the ambulance hears a 595-Hz sound. What is the speed of the car? More than 16 m/s. Between 10 m/s and 12 m/s. Between 12 m/s and 14 m/s. Less than 8 m/s. Between 14 m/s and 16 m/s.
Horseshoe bats (genus Rhinolophus) emit sounds from their nostrils, then listen to the frequency of the sound reflected from their prey to determine the prey's speed. (The "horseshoe" that gives the bat its name is a depression around the nostrils that acts like a focusing mirror, so that the bat emits sound in a narrow beam like a flashlight.) A Rhinolophus flying at speed vbat emits sound of frequency fbat; the sound it hears reflected from an insect flying toward...