Advertisements
Advertisements
प्रश्न
An echo-sounder in a trawler (fishing boat) receives an echo from a shoal of fish 0.4 s after it was sent. If the speed of sound in water is 1500 m/s, how deep is the shoal ?
पर्याय
150 m
300 m
600 m
7500 m
Advertisements
उत्तर
Time taken to list the sent signal is 0.4 s.
Speed of sound in water is 1,500 m/s.
So,
= `(1500 xx 0.4)/2`
= 300 m
(b) 300 m.
APPEARS IN
संबंधित प्रश्न
Which property of sound leads of the formation of echoes ?
Name three devices which work on the reflection of sound.
What is the other name of a loud-hailer ?
Name the device which is used to address a small gathering of people.
In which medium, air or water, an echo is heard much sooner ? Why ?
The speed of sound in water is 1500 metres per second. How far away from an under-sea rock should a deep sea diver be so that he can hear his own echo ?
Explain by giving a scientific reason.
We cannot hear the echo produced in a classroom.
What are the medical applications of echo?
How can you calculate the speed of sound using echo?
Numerical problems:
An echo returned in 3s. What is the distance of the reflecting surface from the source given that the speed of sound is 330 ms-1?
