Unit 4 - Waves

Diagram I below represents a glass tube containing undisturbed air molecules. Diagram II represents the same glass tube when a wave passes through it.

Which type of wave produced the disturbance represented in diagram II?

• Elliptical

• Transverse

• Longitudinal

• Torsional

What is the time for a wave to complete one full cycle called?

• Frequency

• Velocity

• Wavelength

• Period

Which distance represents the wavelength?

• A

• B

• C

• D

As the amplitude of a mechanical wave increases, which of the following quantities increases?

• Speed

• Wavelength

• Frequency

• Energy

Calculate the speed of a periodic wave that has a wavelength of 2.0 m and a frequency of 3.0 Hz.

• 2.0 m/s

• 5.0 m/s

• 6.0 m/s

• 12.0 m/s

Waves X and Y are moving through identical materials. When wave X moves through the material, the particles in the material move up and down. When wave Y moves through the material, the particles in the material move from to side. What can be determined about the waves?

• Wave X is a longitudinal wave and wave Y is a longitudinal wave.

• Wave X is a transverse wave and wave Y is a longitudinal wave.

• Wave X is a longitudinal wave and wave Y is a transverse wave.

• Wave X is a transverse wave and wave Y is a transverse wave.

Which of the following would be the best demonstration of a longitudinal wave?

• Turning a flashlight on and off.

• Squishing and stretching a spring.

• Swinging a rope back and forth.

• Moving a rock up and down.

A student creates a graph of position v. time for the height of a floating buoy as ocean waves go by.

What is the amplitude of the buoy based on the graph?

• 2.0 m

• 2.5 m

• 5.0 m

• The amplitude varies depending on the time.

The diagram represents the wavefronts produced from two sources, A and B.

Which of the labeled points are points of interference?

• C and E

• A and B

• C and D

• D and F

Two pulses traveling in the same uniform medium approach each other, as shown in the diagram below.

Which of the following diagrams best represents the superposition of the two pulses?

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