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प्रश्न
Define sound ranging. Give one use of sound ranging.
उत्तर
The process by which bats and dolphins detect the presence of an obstacle by hearing the echo of the sound produced by them is called sound ranging. These are used in RADAR.
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संबंधित प्रश्न
Write true or false for a given statement.
Loudness depends on frequency.
| Column A | Column B |
| (a) Vibrations cause | (1) absorb sound |
| (b) A shriller sound is | (2) second |
| (c) Unit of frequency | (3) sound |
| (d) Unit of time period | (4) of high pitch |
| (e) Curtains | (5) hertz |
How do we produce sound ?
Name the type of waves produced when a tuning fork is struck in air.
Define the term wave velocity. Write its S.I. unit.
Complete the following sentences :
Sound cannot travel through __________, but it requires a ___________.
An observer sitting in line of two tanks watches the flashes of two tanks firing at each other at the same time, but he hears the sounds of two shots 2s and 3.5s after seeing the flashes. If distance between the two tanks is 510m, find the speed of sound.
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.
How do we hear the sound?
