Advertisements
Advertisements
प्रश्न
In which medium, air or water, an echo is heard much sooner ? Why ?
उत्तर
An echo is heard sooner in water because sound travels faster in water than in air as the speed of sound depends on the density of propagating medium.
APPEARS IN
संबंधित प्रश्न
An echo returned in 3 s. What is the distance of the reflecting surface from the source, given that the speed of sound is 342 m s−1?
What is meant by an echo?
The minimum distance between the source and the reflector in air. So that an echo is heard is approximately equal to ______.
Explain why, the flash of lightning reaches us first and the sound of thunder is heard a little later.
Fill in the blank with suitable word :
An echo is simply a ................... sound.
Fill in the blank with suitable word :
Echoes are caused by the ...................... of sound.
On which day, a hot day or a cold day, an echo is heard sooner ? Give reason for your answer.
A man standing 825 metres away from a cliff (steep rock) fires a gun. After how long will he hear its echo ? Speed of sound in air is 330 m/s.
What is the minimum distance needed for an echo?
What is an echo? Write the conditions to hear an echo.
