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Author Question: Two strings of identical material and radius are stretched with the same tension with their ends ... (Read 219 times)

Jipu 123

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on: Jul 29, 2018
Two strings of identical material and radius are stretched with the same tension with their ends fixed, but one string is 8.0 mm longer than the other. Waves on these strings propagate at 420 m/s.
 
  The fundamental frequency of the longer string is 528 Hz. What is the beat frequency when each string is vibrating at its fundamental frequency? A) 22 Hz
  B) 11 Hz
  C) 16 Hz
  D) 5.5 Hz
  E) 27 Hz

Question 2

Two in-phase loudspeakers are some distance apart. They emit sound with a frequency of 1536 Hz. You move between the speakers, along the line joining them, at a constant speed of 2.8 m/s.
 
  What beat frequency do you observe? The speed of sound in the room is 330 m/s. A) 13 Hz
  B) 431 Hz
  C) 26 Hz
  D) 4.7 Hz
  E) 118 Hz


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SamMuagrove

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Reply #1 on: Jul 29, 2018
Answer to Question 1

B

Answer to Question 2

C


Jipu 123

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Reply #2 on: Jul 29, 2018
TY


SamMuagrove

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Reply #3 on: Jul 29, 2018
You're welcome


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