Advertisements
Advertisements
प्रश्न
What is sound ?
उत्तर
Sound is a form of energy which produces the sensation of hearing.
APPEARS IN
संबंधित प्रश्न
What are ultrasonics? Can you hear the ultrasonic sound?
State the general name of the waves in which the particles of the medium vibrate :
(i) in the same direction as wave.
(ii) at right angles to the direction of wave.
What type of waves are illustrated by the movement of a rope whose one end is fixed to a pole and the other end is moved up and down?
Which of the following frequency of sound can be generated by a vibrating simple pendulum as well as by the vibrating vocal cords of a rhinoceros ?
Match the pairs.
| Group ‘A’ | Group ‘B’ |
| (a) Flute | (1) Frequency less than 20 Hz |
| (b) Frequency | (2) Frequency more than 20000 Hz |
| (c) Sound level | (3) Vibrations in the air |
| (d) Ultrasonic sound | (4) Measured in Hz |
| (e) Infrasonic sound | (5) Decibel |
State three conditions necessary for hearing sound.
Can we produce sound in vacuum?
Explain how the principle of echo is used by
The dolphin to locate small fish as its prey.
What is the SI unit of frequency?
