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emilyhoffman emilyhoffman
wrote...
Posts: 575
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6 years ago
Two tuning forks with frequencies 264 and 262 Hz produce beats. What is the beat frequency (in Hz)?
 a. 4
  b. 2
  c. 1
  d. 3
  e. 0 (no beats are produced)



[Ques. 2] A length of organ pipe is closed at one end. If the speed of sound is 344 m/s, what length of pipe (in cm) is needed to obtain a fundamental frequency of 50 Hz?
 a. 28
  b. 86
  c. 344
  d. 172
  e. 688



[Ques. 3] A vertical tube one meter long is open at the top. It is filled with 75 cm of water. If the velocity of sound is 344 m/s, what will the fundamental resonant frequency be (in Hz)?
 a. 3.4
  b. 172
  c. 344
  d. 1.7
  e. 688



[Ques. 4] An organ pipe open at both ends has a radius of 4.0 cm and a length of 6.0 m. What is the frequency (in Hz) of the third harmonic? (Assume the velocity of sound is 344 m/s.)
 a. 76
  b. 86
  c. 54
  d. 28
  e. 129



[Ques. 5] A clarinet behaves like a tube closed at one end. If its length is 1.0 m, and the velocity of sound is 344 m/s, what is its fundamental frequency (in Hz)?
 a. 264
  b. 140
  c. 86
  d. 440
  e. 172



[Ques. 6] A stretched string is observed to vibrate in three equal segments when driven by a 480-Hz oscillator. What is the fundamental frequency of vibration for this string?
 a. 480 Hz
  b. 320 Hz
  c. 160 Hz
  d. 640 Hz
  e. 240 Hz



[Ques. 7] A string is stretched and fixed at both ends, 200 cm apart. If the density of the string is 0.015 g/cm, and its tension is 600 N, what is the fundamental frequency?
 a. 316 Hz
  b. 632 Hz
  c. 158 Hz
  d. 215 Hz
  e. 79 Hz



[Ques. 8] A string is stretched and fixed at both ends, 200 cm apart. If the density of the string is 0.015 g/cm, and its tension is 600 N, what is the wavelength (in cm) of the first harmonic?
 a. 600
  b. 400
  c. 800
  d. 1000
  e. 200



[Ques. 9] Two harmonic waves traveling in opposite directions interfere to produce a standing wave described by y = 2sin(x)cos(3t), where x is in m and t is in s. What is the distance (in m) between the first two antinodes?
 a. 8
  b. 2
  c. 4
  d. 1
  e. 0.5



[Ques. 10] Two harmonic waves traveling in opposite directions interfere to produce a standing wave described by y = 2sin(4x)cos(3t), where x is in m and t is in s. What is the speed (in m/s) of the interfering waves?
 a. 0.75
  b. 0.25
  c. 1.3
  d. 12
  e. 3.0
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Replies
wrote...
6 years ago
1)  b

2)  d

3)  c

4)  b

5)  c

6)  c

7)  c

8)  b

9)  d

10)  a
emilyhoffman Author
wrote...
6 years ago
Face with Cold Sweat  Can you answer the others that I've posted too?
wrote...
6 years ago
I'll take a quick look at them
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