Advertisements
Advertisements
प्रश्न
The smoke from the gun barrel is seen 2 second before the explosion is heard. If the speed of sound in air is 350 ms-1, calculate the distance of observer from the gun.
Advertisements
उत्तर
The distance of observer from the gun = speed of sound x time taken for the explosion
= 350 x 2 = 700m
APPEARS IN
संबंधित प्रश्न
List four substances which are good absorbers of sound.
The sound of an explosion on the surface of a lake is heard by a boat man 100 m away and by a diver 100 m below the point of explosion.
(i) Who would hear the sound first: boatman or diver?
(ii) Give a reason for your answer in part (i).
(iii) If sound takes time t to reach the boatman, how much time approximately does it take to reach the diver?
Give a scientific reason.
If you were both on the moon, your friend will not be able to hear you call.
How do the following factor affect the speed of sound in air?
Pressure in air.
A person fires a gun and other boy at a distance hears the sound of the fire 2.5 s after seeing the flash. If the speed of sound in air is 330 ms-1, find the distance between the boys.
When a sound wave travels through air, the air particles ______.
Name two musical instruments which produce sound by vibrating strings.
______ is an unwanted sound.
How do we hear the sound?
Name the waves used for sound ranging. State one reason for their use.
