Wave Review #2

The diagram below represents a wave traveling in a rope in the direction indicated. Which arrow represents the motion of a particle at point P at the instant shown?

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Base your answer to the following question on the diagrams below, and on your knowledge of physics. The diagrams represent waves W, A, B, C, and D traveling through the same uniform medium. Which wave has a period that is twice that of wave W?

• A

• B

• C

• D

Base your answer to the following question on the diagrams below, and on your knowledge of physics. The diagrams represent waves W, A, B, C, and D traveling through the same uniform medium. Which wave is 180^o out of phase with wave W?

• A

• B

• C

• D

An acoustic organ is a musical instrument with pipes. The oscillation of air molecules in the pipes of the organ produces sound waves that are

• A) electromagnetic and longitudinal

• B) electromagnetic and transverse

• C) mechanical and longitudinal

• D) mechanical and transverse

Which graph represents the relationship between the frequency and period of a wave?

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A person standing on a sidewalk hears the siren of an ambulance as it approaches, passes by, and goes away from the person. Compared to the frequency of the sound emitted by the siren, the frequency of the sound observed by the person during this event is

• A) higher, only

• B) lower, only

• C) first higher and then lower

• D) first lower and then higher

Two pulses approach each other in the same medium. Which pair of pulses will result in the largest magnitude displacement of the medium as the pulses pass through each other?

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A characteristic common to both sound waves and x rays is that they both

• A) travel fastest in a vacuum

• B) cause particles to vibrate in a direction parallel to the wave's direction of motion

• C) transmit energy without transmitting matter

• D) are mechanical

Light travels from air into another medium with an index of refraction of n. The light has a wavelength of 6.0 x 10^-7 meter in the new medium. Which expression represents the wavelength of this light in air?

• n(6.0 x 10^-7m)

• D) (6.0 x 10^-7m) - n

A tuning fork is used to produce a sound wave having a frequency of 512 hertz. What is the wavelength of the sound wave in air at STP?

• A) 0.646 m

• B) 1.55 m

• C) 3.31 x 10^2 m

• D) 5.86 x 10^5 m