# Units 11 and 12 Review

Waves, Light and Sound

 Navigate to Answers for: [ Questions #1-#14 | Questions #15-#28 | Questions #29-#42 | Questions #43-#56 | Questions #57-#68 ] [ #15 | #16 | #17 | #18 | #19 | #20 | #21 | #22 | #23 | #24 | #25 | #26 | #27 | #28 ]

15. The number of cycles of a periodic wave occuring per unit time is called the wave's

 a. wavelength. b. period. c. amplitude. d. frequency.

Frequency and Period of a Wave (11 seconds)

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16. A source S generates circular waves on a lake. If the frequency of the source is 2.0 Hz and the wave speed is 5.0 m/s then the distance between adjacent wave crests is

 a. 0.20 m. b. 0.40 m. c. 1.25 m. d. 2.5 m. e. 10 m.

The Anatomy of a Wave (6 seconds) | The Wave Equation (7 seconds)

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17. What is the frequency of a water wave that has a speed of 0.4 meter per second and a wavelength of 0.02 meter?

 a. 10 hertz. b. 20 hertz. c. 0.008 hertz. d. 0.5 hertz.

The Wave Equation (7 seconds)

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18. Which one of the following properties of a wave is independent of all the others?

 a. amplitude. b. frequency. c. period. d. velocity. e. wavelength.

The Speed of a Wave (10 seconds)

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19. A pendulum makes 40 vibrations in 20 s. Its period is

 a. 0.50 Hz. b. 0.50 s. c. 2.0 Hz. d. 2.0 s. e. 8.0 x 102 Hz.

Frequency and Period of a Wave (11 seconds)

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20. A period of 0.005 s yields a frequency of

 a. 20 HZ b. 50 Hz c. 200 Hz d. 500 Hz e. 2000 Hz

Frequency and Period of a Wave (11 seconds)

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21. The number of waves generated per second by a source is called the frequency of the source.

 a. True b. False

Frequency and Period of a Wave (11 seconds)

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22. The SI unit for frequency is hertz.

 a. True b. False

Frequency and Period of a Wave (11 seconds)

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23. Doubling the frequency of a wave source doubles the speed of the waves.

 a. True b. False

The Wave Equation (7 seconds)

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24. A vibrating object with a frequency of 200 Hz produces sound which travels through air at 360 m/s. The number of meters separating the adjacent compressions in the sound wave is

 a. 0.900. b. 1.80. c. 3.60. d. 7.20. e. 200.

The Anatomy of a Wave (6 seconds) | The Wave Equation (7 seconds)

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25. If the frequency of a wave is doubled and if the speed remains constant, its wavelength is

 a. quartered. b. halved. c. unchanged. d. doubled.

The Wave Equation (7 seconds)

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26. The line X represents the boundary between two dissimilar springs. A pulse is shown approaching the boundary in diagram 5-7. Which one of the sketches in diagram 5-8 shows a possible configuration of the system shortly after the pulse reaches the boundary?

 a. A b. B c. C d. E

Boundary Behavior (14 seconds)

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27. When a pulse reaches a boundary between two different media, it will be

 a. reflected, only. b. transmitted, only. c. partly reflected and partly transmitted. d. neither reflected nor transmitted.

Boundary Behavior (14 seconds)

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28. The diagram 5-62 shows a transverse pulse traveling along a heavy rope toward its junction with a lighter rope. Which of the diagrams 5-63 best illustrate the ropes at the instant that the reflected pulse again passes through its orignal position marked X?

 a. A b. B c. C d. D e. E

Boundary Behavior (14 seconds)

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