Physics

10. What is the amplitude of the wave in the diagram below? a. 0.03 m. b. 0.04 m. c. 0.05 m. d. 0.06 m.

Answer: A

12. A wave X meters long passes through a medium with a speed of Y meters per second. The frequency of the wave could be expressed as a. Y/X cycles/sec. b. X/Y cycles/sec. c. XY cycles/sec. d. (X + Y) cycles/sec.

Answer: A

2. If the particles of the medium are vibrating to and fro in the same direction of energy transport, then the wave is a ____ wave. a. longitudinal b. sound c. standing d. transverse

Answer: A

21. TRUE or FALSE: The number of waves generated per second by a source is called the frequency of the source. a. True b. False

Answer: A

22. TRUE or FALSE: The SI unit for frequency is hertz. a. True b. False

Answer: A

34. TRUE or FALSE: Constructive interference of waves occurs when two crests meet. a. True b. False

Answer: A

4. A transverse wave is traveling through a medium. See diagram below. The particles of the medium are vibrating _____. a. parallel to the line joining AD. b. along the line joining CI. c. perpendicular to the line joining AD. d. at various angles to the line CI. e. along the curve CAEJGBI.

Answer: A

14. If the distance from point A to point B in the diagram is 60 cm, then the wavelength is ____. a. 20 cm. b. 40 cm. c. 60 cm. d. 90 cm.

Answer: B

17. What is the frequency of a wave that has a speed of 0.4 m/s and a wavelength of 0.020 meter? a. 10 hertz. b. 20 hertz. c. 0.008 hertz. d. 0.5 hertz.

Answer: B

19. A pendulum makes exactly 40 vibrations in 20.0 s. Its period is ____. (Be cautious of the units.) a. 0.500 Hz. b. 0.500 s. c. 2.00 Hz. d. 2.00 s. e. 8.00 x 102 Hz.

Answer: B

23. TRUE or FALSE: Doubling the frequency of a wave source (without altering the medium) doubles the speed of the waves. a. True b. False

Answer: B

24. 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.

Answer: B

31. A standing wave experiment is performed to determine the speed of waves in a rope. The standing wave pattern shown below is established in the rope. The rope makes exactly 90 complete vibrational cycles in one minute. The speed of the waves is ____ m/s. a. 3.0 b. 6.0 c. 180 d. 360 e. 540

Answer: B

5. If the energy in a longitudinal wave travels from south to north, the particles of the medium would be vibrating _____. a. from north to south, only b. both north and south c. from east to west, only d. both east and west

Answer: B

8. As a wave travels into a medium in which its speed increases, its wavelength would ____. a. decrease b. increase c. remain the same

Answer: B

20. A period of 0.005 seconds would be equivalent to a frequency of ____ Hz. a. 20 b. 50 c. 200 d. 500 e. 2000

Answer: C

32. Consider the standing wave pattern shown below. A wave generated at the left end of the medium undergoes reflection at the fixed end on the right side of the medium. The number of antinodes in the diagram is _____. a. 3 b. 5 c. 6 d. 7 e. 12

Answer: C

35. Which phenomenon is produced when two or more waves passing simultaneously through the same medium meet up with one another? a. refraction b. diffraction c. interference d. reflection

Answer: C

6. As a pulse travels though a uniform medium, the speed of the pulse ____. a. decreases b. increases c. remains the same

Answer: C

1. A single disturbance that moves from point to point through a medium is called a ___. a. period b. periodic wave c. wavelength d. pulse

Answer: D

11. The wavelength of the wave in the diagram above (Question #10) is ____ m. a. 0.030 b. 0.040 c. 0.060 d. 0.080

Answer: D

15. The number of cycles of a periodic wave occurring per unit time is defined as a wave's ____. a. wavelength. b. period. c. amplitude. d. frequency.

Answer: D

16. A periodic and repeating disturbance in a lake creates waves which emanate outward from its source to produce circular wave patterns. If the frequency of the source is 2.00 Hz and the wave speed is 5.00m/s then the distance between adjacent wave crests is ___ meter. a. 0.200 b. 0.400 c. 1.25 d. 2.50 e. 10.0

Answer: D

18. Many wave properties are dependent upon other wave properties. Yet, one wave property is independent of all other wave properties. Which one of the following properties of a wave is independent of all the others? a. wavelength b. frequency c. period d. velocity

Answer: D

29. The diagram at the right shows a disturbance moving through a rope towards the right. If this disturbance meets a similar disturbance moving to the left, then which one of the diagrams below depict a pattern which could NEVER appear in the rope?

Answer: D

3. When the particles of a medium are vibrating at right angles to the direction of energy transport, then the wave is a ____ wave. a. longitudinal b. sound c. standing d. transverse

Answer: D

30. A 2.0-meter long rope is hanging vertically from the ceiling and attached to a vibrator. A single pulse is observed to travel to the end of the rope in 0.50 s. What frequency should be used by the vibrator to maintain three whole waves in the rope? a. 0.75 Hz b. 1.3 Hz c. 4.0 Hz d. 6.0 Hz e. 8.0 Hz

Answer: D

33. A node is a point located along the medium where there is always ___. a. a double crest b. c. constructive interference d. destructive interference e. a double rarefaction

Answer: D

36. Two pulses are traveling in opposite directions along the same medium as shown in the diagram at the right. Which diagram below best depicts the appearance of the medium when each pulse meets in the middle?

Answer: D

Consider the following diagram for Questions #13-#14. 13. How many complete waves are shown in the diagram? a. 1 b. 2 c. 3 d. 1.5

Answer: D

9. As a wave passes across a boundary into a new medium, which characteristic of the wave would NOT change? a. speed b. frequency c. wavelength

B

7. The main factor which effects the speed of a sound wave is the ____. a. amplitude of the sound wave b. intensity of the sound c. loudness of the sound d. properties of the medium e. pitch of the sound

D