Advertisements
Advertisements
प्रश्न
Match the following.
| Ultrasonics | Frequency below 20Hz |
| Speed of sound in air | Needs material medium |
| Infrasonics | 330ms-1 |
| Sound propagation | Frequency more than 20000 Hz |
Advertisements
उत्तर
| Ultrasonics | Frequency more than 20000 Hz |
| Speed of sound in air | 330ms-1 |
| Infrasonics | Frequency below 20Hz |
| Sound propagation | Needs material medium |
APPEARS IN
संबंधित प्रश्न
What change do you expect in the characteristics of a musical sound if
(i) Its frequency is increased,
(ii) Its amplitude is increased?
What is a transverse wave? In which medium: solid, liquid or gas, can it be produced?
An observer X is on an island 5500 m from a vertical cliff on the shore. A ship Y is anchored between the island and the Cliff. A blast on the ship’s siren is heard twice by X, the interval being 5s. [Velocity of sound = 330 ms−1]
(i) Find the distance of the ship from the island.
(i) Find the distance of the cliff from the ship.
The distance between three consecutive crests of wave is 60 cm. If the waves are produced at the rate of 180/ min, calculate:
- wavelength
- time period
- wave velocity.
How does the speed of sound depend on (i) Amplitude, and (ii) Wavelength?
What is the value of sound of room temperature?
Match the following.
| 1. | Tuning fork | The point where density of air is maximum |
| 2. | Sound | Maximum displacement from the equilibrium position. |
| 3. | Compressions | The sound whose frequency is greater than 20,000 Hz. |
| 4. | Amplitude | Longitudinal wave. |
| 5. | Ultasonics | Production of sound. |
An earthquake produces which kind of sound before the mainshock wave begins
What are the uses of infrasonic sound?
