Question

In: Physics

A bird is flying directly toward a stationary bird-watcher and emits a frequency of 1380 Hz....

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?

Solutions

Expert Solution

Here is what I solved before, please modify the figures as per your question. Please let me know if you have further questions. Ifthis helps then kindly rate 5-stars.

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.

?

?

?

ofspeed of sound in air


Related Solutions

A bird flying directly toward a stationary bird-watcher emits a cry at a frequency of 1,030Hz....
A bird flying directly toward a stationary bird-watcher emits a cry at a frequency of 1,030Hz. The bird-watcher hears a frequency of 1120 Hz. The speed of sound on this day is 341m/s. a,What is the speed of the bird? b, Now there are two birds emitting a cry at 1,030Hz. Both are flying east, one on each side of the birdwatcher. One is flying at 23m/s while the other is flying at 33m/s. Is there anything the birdwatcher can...
A siren emitting a sound of frequency 1100 Hz moves away from you toward the face...
A siren emitting a sound of frequency 1100 Hz moves away from you toward the face of a cliff at a speed of 15 m/s. Take the speed of sound in air as 330 m/s. (a) What is the frequency of the sound you hear coming directly from the siren? (Give your answer to at least one decimal place.) Hz (b) What is the frequency of the sound you hear reflected off the cliff? (Give your answer to at least...
A 4.4 x 10^14 Hz laser emits a 2.1
A 4.4 x 10^14 Hz laser emits a 2.1
A stationary radar device emits a pulse at 10 Gigahertz. A vehicle is coming towards the...
A stationary radar device emits a pulse at 10 Gigahertz. A vehicle is coming towards the device and reflects a signal with a difference of 1.33 kHz. Is this signal a lower or higher frequency? What is the speed of the vehicle?
At a factory, a noon whistle is sounding with a frequency of 480 Hz. As a...
At a factory, a noon whistle is sounding with a frequency of 480 Hz. As a car traveling at 61.0 km/h approaches the factory, the driver hears the whistle at frequency fi. After driving past the factory, the driver hears frequency ff. What is the change in frequency ff - fi heard by the driver? Assume the speed of sound in air is 343 m/s.
Atubeisopenonlyatoneend.Acertainharmonicproducedby the tube has a frequency of 450 Hz. The next higher harmonic has a frequency...
Atubeisopenonlyatoneend.Acertainharmonicproducedby the tube has a frequency of 450 Hz. The next higher harmonic has a frequency of 750 Hz. The speed of sound in air is 343 m /s. (a) What is the integer n that describes the harmonic whose frequency is 450 Hz? (b) What is the length of the tube?
A series RCL circuit has a resonant frequency of 1470 Hz. When operating at a frequency...
A series RCL circuit has a resonant frequency of 1470 Hz. When operating at a frequency other than 1470 Hz, the circuit has a capacitive reactance of 5.0 Ω and an inductive reactance of 26.0 Ω. (a) What is the value of L? (b) What is the value of C?
A series RCL circuit has a resonant frequency of 1470 Hz. When operating at a frequency...
A series RCL circuit has a resonant frequency of 1470 Hz. When operating at a frequency other than 1470 Hz, the circuit has a capacitive reactance of 5.0 ? and an inductive reactance of 25.0 ?. (a) What is the value of L? (b) What is the value of C? Me and a friend have been trying to figure this out for a while. I know I have the XL = 2*pi*f*L formula. Any help would be appreciated (particularly if...
In music, middle C has a frequency of about 256 Hz - the precise frequency depends...
In music, middle C has a frequency of about 256 Hz - the precise frequency depends on the tuning scheme. How does the wavelength of a middle C note propagating through air compare to the size of a typical human body? How does the wavelength of the same note propagating through water compare to the human body? What frequency of sound in air has a wavelength nearly the size of a human head? This size is important because we have...
A new type of bird capable of self-propulsion is designed in order to maximise its flying...
A new type of bird capable of self-propulsion is designed in order to maximise its flying distance in the presence of aerodynamic drag. This new bird, having the initial mass of mo, generates thrust by ejecting 1% of its initial mass (0.01mo) with the velocity of 50m/s in the direction opposite to the bird’s instantaneous velocity relative to the bird every 0.1s (similar to how rockets generate thrust). function [vx_f,vy_f,m_f] = mass_ejection(vx_i,vy_i,v_eb,m_i,m_e) % Inputs: % vx_i: Velocity component in x...
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT