Advertisements
Advertisements
प्रश्न
A worker lives at a distance of 1.32 km from the factory. If the speed of sound in air be 330 m/s, how much time will the sound of factory siren take to reach the worker?
Advertisements
उत्तर
We have to calculate the time taken by the sound wave to reach the observer.
Given: Velocity of sound ν = 330 m/s
Distance between the observer and the source d = 1,320 m.
We know, `"Time" = "Distance"/"Speed"`
Therefore , time taken by the sound wave to reach the observer is = `1320/330` s
= 4 s
So , the time taken is 4 s .
APPEARS IN
संबंधित प्रश्न
Describe an experiment to show that sound can travel in a solid.
During a thunderstorm, the sound of a thunder is heard after the lightning is seen. Why?
What name is given to those aircrafts which fly at speeds greater than the speed of sound?
What is meant by supersonic speed?
Which of the following travels slowest in air and which one fastest? Supersonic aircraft, Light, Sound
Calculate the speed of a sound wave whose frequency is 2 kHz and wavelength 65 cm.
The drawing shows a ship 800 m from a cliff. A gun is fixed on the ship. After 5 seconds the people at the front of the ship hear the sound of the gun again.
(a) What is the name of this effect ?
(b) What happens to the sound at the cliff ?
(c) How far does the sound travel in 5 seconds ?
(d) Calculate the speed of sound.
The incidence of ______ in daily life shows that the velocity of sound is less than the velocity of light.
Nita heard the sound of lightning after 4 seconds of seeing it. What was the distance of the lightning from her?
(The velocity of sound in air is 340 m/s.)
When temperature increases the speed of sound ______.
