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QUIZ 13 CHAPTER 19 |
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| 23. How far in terms of wavelength does the crest of a wave travel in 6 periods? |
| a. one sixth of a wavelength |
| b. 6 wavelengths* |
| c. 3 wavelengths |
| d nota |
| 24. The vibrations of a wave on a string move in a direction |
| a. along the direction of motion of the wave |
| b. at right angles to the direction of motion of the wave* |
| c. nota |
| 25.The vibrations of a sound wave move in a direction |
| a. along the direction of motion of the wave* |
| b. at right angles to the direction of motion of the wave |
| c. nota |
| 26. A transverse wave has wavelength 0.5 m and the frequency is 6 cycles per second. The wave speed is |
| a. 1/3 m/s |
| b. 3 m/s* |
| c. 12 m/s |
| d. 1/12 m/s |
| e. nota |
| 27. True or False. A standing wave can be thought of as the sum of two waves moving in the same direction. |
| a. True |
| b. False* |
| 28 In a transverse standing wave, an anti-node is a position of |
| a. zero or minimal transverse displacement |
| b. maximum transverse displacement* |
| 29. A railroad locomotive is at rest with its whistle blowing and starts moving toward you. The frequency that you hear will |
| a. increase * |
| b. decrease |
| c. will not change |
| 30. In the previous problem, the wavelength reaching your ear will |
| a. increase |
| b. decrease * |
| c. remain the same |
| 31. Assuming the wave speed remains the same, when the frequency of a wave decreases, the wavelength |
| a. decreases |
| b. increases* |
| c. remains the same |