Name:    Waves

Multiple Choice
Identify the choice that best completes the statement or answers the question.

1.

Two waves can occupy the same space at the same time because waves
 a. are matter. c. do not cause interference patterns. b. are displacements of matter. d. cannot pass through one another.

2.

At a fixed boundary, waves are
 a. neither reflected nor inverted. c. reflected and inverted. b. reflected but not inverted. d. inverted but not reflected.

3.

At a free boundary, waves are
 a. neither reflected nor inverted. c. reflected and inverted. b. reflected but not inverted. d. inverted but not reflected.

4.

When the compression of one longitudinal wave and the rarefaction of another combine, there is
 a. reflection b. an antinode c. destructive interference d. constructive interference

5.

What happens if two light waves with the same amplitude interfere constructively?
 a. the amplitude of the resultant wave is zero b. the amplitude of the resultant wave is half their amplitude c. the amplitude of the resultant wave is twice their amplitude d. the amplitude of the resultant wave is four times their amplitude

The following questions are based on the following illustration of a wave traveling in the positive x direction with a frequency of 33.3 Hz. 6.

What is the amplitude of the wave?
 a. 5.0 cm b. 6.0 cm c. 10.0 cm d. 12.0 cm

7.

What is the wavelength of the wave?
 a. 5.0 cm b. 6.0 cm c. 10.0 cm d. 12.0 cm

8.

What is the speed of the wave?
 a. 0.0300 m/s b. 3.33 m/s c. 333 m/s d. 166 m/s

9.

Vibrations in a ______ wave are always parallel to the direction of wave motion, while vibrations in a ______ are perpendicular to the direction of wave motion.
 a. longitudinal . . transverse b. transverse . . longitudinal c. mechanical . . longitudinal d. transverse . . electromagnetic

10.

How do electromagnetic waves differ from all other types of waves?
 a. They can travel through air. b. They can travel through space. c. They can be reflected by mirrors. d. They can only exist if they have a medium.

11.

Which of the following is transmitted by a wave?
 a. matter b. particles c. energy d. a medium

12.

A high school physics teacher leaves the classroom door open while she discusses waves with the class. The principal of the school standing at the other end of the hallway is able to hear the voice of the physics teacher. The fact that the principal can hear the physics teacher is an example of what wave phenomena?
 a. interference b. diffraction c. resonance d. Doppler effect

13.

How are frequency and period related in simple harmonic motion?
 a. They are directly related. b. They are inversely related. c. They both measure the time per cycle. d. They both measure the number of cycles per unit of time.

14.

An amusement park ride swings back and forth once every 40.0 s. What is the ride’s frequency?
 a. 2.50 ´ 10–2 Hz c. 25.0 ´ 10–2 Hz b. 5.00 ´ 10–2 Hz d. 40.0 ´ 10–2 Hz 15.

In the waveform of the longitudinal wave shown above, the compressed regions correspond to
 a. the wavelength. c. troughs. b. crests. d. the mass.

16.

A periodic wave has a wavelength of 0.50 m and a speed of 20 m/s. What is the wave frequency?
 a. 0.02 Hz c. 40 Hz b. 20 Hz d. 10 Hz 17.

How many nodes and antinodes are shown in the standing wave above?
 a. two nodes and three antinodes c. one-third node and one antinode b. one node and two antinodes d. three nodes and two antinodes

The following questions are based on the following illustration of a wave traveling in the positive x direction with a frequency of 33.3 Hz. 18.

A wave of frequency 25.5 Hz travels at a speed of 3.5 m/s. What is the wavelength of the wave (in centimeters)?

19.

As waves pass by a duck floating on a lake, the duck bobs up and down but remains in essentially one place. A woman sitting on a park bench next to the lake counts that the duck bobs 15 times in 45 seconds. Recall that wave frequency describes the number of waves that pass a given point in a unit of time. What is the frequency (in Hz) of the waves on the lake?