Physics Practice: Propagation of Sound Waves (Mock Test 3 - Advanced)
1. When a sound wave travels from air into water, which of the following remains unchanged?
2. For a wave, the distance traveled by the wave in one time period ($T$) is equal to ________.
3. What is the approximate speed of sound in steel?
4. Transverse waves can only travel through ________ and on the surface of liquids.
5. If the time period of a wave is $0.02\text{ s}$, its frequency is:
6. A region of low pressure and low density in a longitudinal wave is called a ________.
7. The speed of sound ________ as the density of air decreases (keeping other factors constant).
8. Which of the following frequencies is audible to a dog but not to a human?
9. In a transverse wave, the maximum upward displacement is called ________.
10. The speed of sound in air at $20^\circ\text{C}$ is ________ than at $0^\circ\text{C}$.
11. Sound energy is transmitted through a medium by the ________ of the particles.
12. Ultrasonic waves are used in ________ to detect internal cracks in metal blocks.
13. The displacement-distance graph of a wave shows its ________ and ________.
14. When a wave travels from one medium to another, the speed and wavelength change but ________ remains constant.
15. The wavelength of audible sound in air ($V=330\text{ m/s}$) for a frequency of $1000\text{ Hz}$ is:
16. Which of the following is NOT a property of an ultrasonic wave?
17. Lightning is seen before thunder is heard because ________.
18. The unit of wavelength is ________.
19. Echolocation is used by ________.
20. If $V$ is speed, $f$ is frequency and $T$ is time period, then ________.