Physics Practice: Sound (Mock Test 5 - Ultimate Comprehensive)
1. Sound waves in air are ________ waves.
2. The distance between two consecutive compressions or two consecutive rarefactions is called ________.
3. Which of the following is the relationship between velocity ($v$), frequency ($f$), and wavelength ($\lambda$)?
4. To hear an echo, the reflected sound must reach the ear after at least ________ seconds.
5. Sound travels through a medium in the form of ________.
6. Frequency ($f$) and Time Period ($T$) are related as ________.
7. Shrillness of sound is another name for its ________.
8. Echoes are produced due to ________ of sound waves.
9. Bats fly in the dark without colliding with obstacles by using ________ waves.
10. The vocal cords in men are about ________ mm long.
11. A bomb explodes on the Moon. You will hear the sound on Earth after ________.
12. The amplitude of a wave is measured in units of ________.
13. In stringed instruments, the pitch can be decreased by ________ the length of the string.
14. The speed of sound in steel is approximately ________.
15. An object vibrating at $10 \text{ Hz}$ produces ________ sound.
16. The characteristic of sound that depends on the waveform is its ________.
17. A megaphone works on the principle of ________ reflection of sound.
18. We can hear around corners due to the ________ of sound waves.
19. If a body makes $100$ vibrations in $5 \text{ seconds}$, its frequency is ________.
20. Noise pollution can be reduced by ________ along roadsides.