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 |