1. Chapter 20

2. The graph at the top is the history graph at x = 4 m of a wave traveling to the right at a speed of 2 m/s. Which is the history graph of this wave at x = 0 m?
STT20.1
(1) (2) (3) (4)

3. The graph at the top is the history graph at x = 4 m of a wave traveling to the right at a speed of 2 m/s. Which is the history graph of this wave at x = 0 m?
STT20.1
(1)
(2)
(3) (4)

4. 1. Move your hand up and down more quickly as you generate the pulse.
Which of the following actions would make a pulse travel faster down a stretched string?
1. Move your hand up and down more quickly as you generate the pulse.
2. Move your hand up and down a larger distance as you generate the pulse.
3. Use a heavier string of the same length, under the same tension.
4. Use a lighter string of the same length, under the same tension.
5. Use a longer string of the same thickness, density and tension.
STT20.2

5. 1. Move your hand up and down more quickly as you generate the pulse.
Which of the following actions would make a pulse travel faster down a stretched string?
1. Move your hand up and down more quickly as you generate the pulse.
2. Move your hand up and down a larger distance as you generate the pulse.
3. Use a heavier string of the same length, under the same tension.
4. Use a lighter string of the same length, under the same tension.
5. Use a longer string of the same thickness, density and tension.
STT20.2

6. What is the frequency of this traveling wave?
1. 10 Hz Hz Hz Hz Hz
STT20.3

7. What is the frequency of this traveling wave?
1. 10 Hz Hz Hz Hz Hz
STT20.3

8. What is the phase difference between the crest of a wave and the adjacent trough?
1. 0
2. π /4
3. π /2
4. 3 π /2
5. π
STT20.4

9. What is the phase difference between the crest of a wave and the adjacent trough?
1. 0
2. π /4
3. π /2
4. 3 π /2
5. π
STT20.4

10. A light wave travels through three transparent materials of equal thickness. Rank is order, from the largest to smallest, the indices of refraction n1, n2, and n3.
1. n2 > n1 > n3
2. n3 > n1 > n2
3. n1 > n2 > n3
4. n3 > n2 > n1
5. n1 = n2 = n3
STT20.5

11. A light wave travels through three transparent materials of equal thickness. Rank is order, from the largest to smallest, the indices of refraction n1, n2, and n3.
1. n2 > n1 > n3
2. n3 > n1 > n2
3. n1 > n2 > n3
4. n3 > n2 > n1
5. n1 = n2 = n3
STT20.5

12. Amy and Zack are both listening to the source of sound waves that is moving to the right. Compare the frequencies each hears.
STT20.6
1. fAmy < fZack
2. fAmy = fZack
3. fAmy > fZack

13. Amy and Zack are both listening to the source of sound waves that is moving to the right. Compare the frequencies each hears.
STT20.6
1. fAmy < fZack
2. fAmy = fZack
3. fAmy > fZack

14. Chapter 20
Reading Quiz

15. A graph showing wave displacement versus position at a specific instant of time is called a
1. snapshot graph.
2. history graph.
3. bar graph.
4. line graph.
5. composite graph.
IG20.2a

16. A graph showing wave displacement versus position at a specific instant of time is called a
1. snapshot graph.
2. history graph.
3. bar graph.
4. line graph.
5. composite graph.
IG20.2a

17. A graph showing wave displacement versus time at a specific point in space is called a
1. snapshot graph.
2. history graph.
3. bar graph.
4. line graph.
5. composite graph.
IG20.2a

18. A graph showing wave displacement versus time at a specific point in space is called a
1. snapshot graph.
2. history graph.
3. bar graph.
4. line graph.
5. composite graph.
IG20.2a

19. A wave front diagram shows
1. the wavelengths of a wave.
2. the crests of a wave.
3. how the wave looks as it moves toward you.
4. the forces acting on a string that’s under tension.
5. Wave front diagrams were not discussed in this chapter.
IG30.3

20. A wave front diagram shows
1. the wavelengths of a wave.
2. the crests of a wave.
3. how the wave looks as it moves toward you.
4. the forces acting on a string that’s under tension.
5. Wave front diagrams were not discussed in this chapter.
IG30.3

21. The waves analyzed in this chapter are
1. sound waves.
2. light waves.
3. string waves.
4. water waves.
5. all of the above.
IG20.4

22. The waves analyzed in this chapter are
1. sound waves.
2. light waves.
3. string waves.
4. water waves.
5. all of the above.
IG20.4