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110 Hz,330 Hz, 550 Hz 220 Hz,330 Hz, 550 Hz 330 Hz,440 Hz, 550 Hz 110 Hz,330 Hz, 880 Hz 330 Hz,880 Hz, 990 Hz

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110 Hz,330 Hz, 550 Hz 220 Hz,330 Hz, 550 Hz 330 Hz,440 Hz, 550 Hz 110 Hz,330 Hz, 880 Hz 330 Hz,880 Hz, 990 Hz

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  1. An organ pipe open at both ends is 1.5 m long. A second organ pipe that is closed at one end and open at the other is 0.75 m long. The speed of sound in the room is 330 m/s. Which of the following sets of frequencies consists of frequencies which can be produced by both pipes? Select the correct answer. • 110 Hz,330 Hz, 550 Hz • 220 Hz,330 Hz, 550 Hz • 330 Hz,440 Hz, 550 Hz • 110 Hz,330 Hz, 880 Hz • 330 Hz,880 Hz, 990 Hz

  2. Two tuning forks with frequencies 257 and 263 Hz produce "beats". What is the beat frequency (in Hz)? Select the correct answer. • 6 • 0 (no beats are produced) • 4 • 3 • 1

  3. Two instruments produce a beat frequency of 9 Hz. If one has a frequency of 239 Hz, what could be the frequency of the other instrument? Select the correct answer. • 248 Hz • 9 Hz • 239 Hz • 257 Hz • 221 Hz

  4. Two harmonic waves traveling in opposite directions interfere to produce a standing wave described by y = 8sin (0.25πx) cos(3πt) where x is in m and t is in s. What is the distance (in m) between the first two antinodes? Select the correct answer. • 4 • 0.2 • 1 • 3 • 2

  5. 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)? Select the correct answer. • 344 • 1.3 • 3.5 • 688 • 172

  6. Two harmonic waves traveling in opposite directions interfere to produce a standing wave described by y = 3sin(2x) cos9t where x is in m and t is in s. What is the wavelength of the interfering waves? Select the correct answer. • 3.14 m • 6.28 m • 2.00 m • 5.00 m • 7.00 m

  7. 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 40 Hz? Select the correct answer. • 215 • 383 • 258 • 365 • 134

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