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Author Question: Tuning forks 1, 2, and 3 each have slightly different frequencies.When 1 and 2 are sounded together, ... (Read 188 times)

Zulu123

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  • Posts: 525
on: Jul 28, 2018
Tuning forks 1, 2, and 3 each have slightly different frequencies.When 1 and 2 are sounded together, a beat frequency of 3 Hz results. When 2 and 3 are sounded together, a beat frequency of 5 Hz results. If the frequency of 1 is 100 Hz, which of the following cannot be the frequency of 3?
 a. 92 Hz
  b. 95 Hz
  c. 98 Hz
  d. 102 Hz
  e. 108 Hz

Question 2

A fire engine approaches a wall at 5 m/s while the siren emits a tone of 500 Hz frequency. At the time, the speed of sound in air is 340 m/s. How many beats per second do the people on the fire engine hear?
 a. 0
  b. 15
  c. 29
  d. 63
  e. 250


ankilker

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  • Posts: 328
Reply #1 on: Jul 28, 2018
Answer to Question 1

B

Answer to Question 2

B


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