Advertisements
Advertisements
Question
At 20°C, the minimum distance of a person from a sound reflecting surface to hear an echo is :
Options
12.2 m
17.2 m
15.2 m
34.4 m
Solution
At room temperature, the minimum distance for echo is 17.2 m.
(b) 17.2 m.
APPEARS IN
RELATED QUESTIONS
Which characteristics of the sound helps you to identify your friend by his voice while sitting with others in a dark room?
How do we produce sound ?
List the measures that you will take when designing a sound-proof room.
Define the term intensity of a sound wave. State the unit in which it is measured.
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.
State the effect of pressure on the speed of sound in air.
Name the Sound of the Frequency Given Below:
200 Hz
Which of the following statements are correct?
- Sound is produced by vibrations.
- Sound requires a medium for propagation.
- Light and sound both require a medium for propagation.
- Sound travels slower than light.
What happens to the speed of sound when it gases from a solid to a gaseous state?
Sound travels in the air as ______ wave.
