14. If 20,000 waves are performed in 2 minutes, then the period is . . .
Answer:
F = 20,000 = 166.7 Hz
120
P = 1 s
166.7
15. Look at the following figure of a wave.
t = 10 s
| |
Answer:
F = 20,000 = 166.7 Hz
120
P = 1 s
166.7
15. Look at the following figure of a wave.
t = 10 s
| |
The frequency of the wave is . . .
Answer:
F = 1 = 0.1 Hz
10
16. The frequency of a wave is 200 Hz. If the velocity of the wave is 400 m/s, the wavelength is . . .
Answer:
Wavelength = velocity = 400 = 2 m
frequency 200
17. Look at the following figure of a transverse wave.
With the frequency of 50 Hz and wavelength of 1 m, the velocity of the wave is . . .
Velocity = wavelength x frequency
= 1 x 50 = 50 m/s
18. If one complete wave consists of one compression and one expansion part, then the name of the wave is . . .
Answer: Longitudinal wave
19. The velocity of a wave is 100 m/s and its frequency is 150 Hz. The wavelength is . . .
Answer:
wavelength = velocity = 100 = 0.67 m
frequency 150
20. Sound propagates in the air with a speed 350 m/s. If the frequency of the keynote a is 450 Hz, then the wavelength is . . .
Answer:
wavelength = velocity = 350 = 0.78 m
frequency 450
No comments:
Post a Comment