A person clapped his hands near a cliff and heard the echo after 5 s. What is the distance of the cliff from the person if the speed of the sound, v is taken as 346 m s–1?
NCERT Class IX
Sciences - Main Course Book
Chapter 12. Sound
Answers
Answered by
182
The sound traveled from the place the person stood, to the cliff and then rebounded back to the person , so the person heard the resound/echo.
So the sound traveled twice the distance between him/her and the cliff.
Distance between cliff and person = 346 m/sec * 5 seconds / 2
= 865 meters
So the sound traveled twice the distance between him/her and the cliff.
Distance between cliff and person = 346 m/sec * 5 seconds / 2
= 865 meters
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Answered by
88
Given,
Speed of sound=346m/s squ.
Time=5s
Distance=v×t
2d = 346×5
2d = 1730
d = 1730/2
d = 865m
Distance between the person and the cliff is 865m
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