Here, Marry will hear two frequencies. First her own frequency -
f1 = 888 Hz
The other frequency is reflected from the wall. Let us assume this frequency as f2 and calculate this.
Speed of Marry, v = 4.17 m/s
Speed of sound, c = 340 m/s
Apparant frequency received by the wall, f' = f1*(1 + v/c) = 888*(1 + 4.17/340) = 899 Hz
This frequency acts as a source for the reflected wave.
So, frequency of the reflected sound wave received by Marry -
f2 = f'*(1 + v/c) = 899*(1+4.17/340) = 910 Hz
Therefore, the beat frequency = f2 - f1 = 910 - 888 = 22 Hz (Answer)
Hope, you understand the solution!
Hint Mary sings a note with a frequency of 888 Hz as she runs toward a...
With what speed must the bat fly toward the singer? An avant-garde composer wants to use the Doppler effect in his new opera. As the soprano sings, he wants a large bat to fly toward her from the back of the stage. The bat will be outfitted with a microphone to pick up the singer's voice and a loudspeaker to rebroadcast the sound toward the audience. The composer wants the sound the audience hears from the bat to be, in...
Please explain and show how to do the exercise (at the bottom), parts b and c. Explain what you are substituting in the Doppler equations and why. Also please explain what signs you have to use. EXAMPLE 14.11 Sour Notes Goal Apply the beat frequency concept. Problem A certain piano string is supposed to vibrate ning, what beat frequency is observed by the assistant? at a frequency of 4.40 X 102 Hz. To check its frequency, Note: Assume all numbers...
I am completing a study guide for the next section of class because I am trying to get ahead. Any suggestions? A wave whose displacement velocity is either in the same direction or opposite direction as the wave velocity describes which type of a wave? a. Transverse wave b. Mechanical wave c. Longitudinal wave d. Electromagnetic wave Which of the following are always one wavelength apart and are drawn as parallel lines? Plane waves b. Wave fronts c. Wave phase...
Using the book, write another paragraph or two: write 170 words: Q: Compare the assumptions of physician-centered and collaborative communication. How is the caregiver’s role different in each model? How is the patient’s role different? Answer: Physical-centered communication involves the specialists taking control of the conversation. They decide on the topics of discussion and when to end the process. The patient responds to the issues raised by the caregiver and acts accordingly. On the other hand, Collaborative communication involves a...