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प्रश्न
What is echolocation? How do animals make use of this phenomenon?
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उत्तर
Echolocation is defined as sending out sounds to judge the location, size, and motion of objects from the returning echoes. The animals use this phenomenon to locate the obstacles in their path and avoid them so it helps them in navigation and to locate their prey.
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संबंधित प्रश्न
State the general name of the waves in which the particles of the medium vibrate :
(i) in the same direction as wave.
(ii) at right angles to the direction of wave.
A cannon is fired at A (see diagram). An observer at B hears two sounds. The first sound is heard after 1 second and the second 3s after the observer sees the flash. (Velocity of sound = 340 ms−1)
(i) Why does the observer see the flash before he hears the sound?
(ii) Calculate the distance x between the observer and the wall.

Describe briefly an experiment to prove that vibrating bodies produce sound.
On placing your ear close to an iron railing which is tapped some distance away, sound is heard twice. Explain, why?
Can you hear the sound produced due to the vibrations of second's pendulum?
Name the Sound of the Frequency Given Below:
200 Hz
Sound travels in the form of ______.
The sound waves are reflected from an obstacle into the same medium from which they were incident. Which of the following changes?
Longitudinal waves are produced in solids liquids and also in gases.
