Advertisements
Advertisements
प्रश्न
Advertisements
उत्तर
Velocity of sound = `"distance travelled"/"time taken" = (2"d")/"t"`
t = `(2"d")/"v" = (2 xx 660)/330` = 4s
Thus, the girl hears the echo after 4s.
APPEARS IN
संबंधित प्रश्न
Fill in the blank.
________ produces a sensation in ears.
What is sound ?
Define time period.
Name the two characteristics of sound which differentiate two sounds from each other.
How can the pitch of sound produced in a piano be changed ?
Give a scientific reason.
If you were both on the moon, your friend will not be able to hear you call.
The diagram given below shows a displacement distance graph of a wave. If the velocity of wave is 160 ms-1, calculate:
- wavelength
- frequency
- amplitude.
The time interval between a lighting flash and the first sound of thunder was found to be 6 s. If the speed of sound in air is 330 ms-1, find the distance of the flash from the observer.
Define one hertz.
