Abhay Agarwal
from
St Francis School, Ghaziabad
Subject :NSO Class : Class 8
An echo repeats two syllables. A single syllable takes about 1/5th of a second to utter. If the velocity of sound is 330 m s–1, then the distance of the reflecting surface is
A 66.0 m
B 33.0 m
C 99.0 m
D 16.5 m
Ans 2:
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vatsal jay gandhi
from
new era senior secondary school, Vadodara
Class : Class 8
please explain this question.
Ans 3:
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Akhil Budithi
from
Kennedy high the global school , Hyderabad
Class : Class 8
please explain this question.
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Nilanjana De
from
Delhi Public School North, Bengaluru
Class : Class 8
Can someone please explain this question?
Ans 6:
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Ans 7:
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Bhramana Roy
from
Glendale Academy International, Hyderabad
Class : Class 8
Time taken to utter single syllable=1/5th of a sSpeed of sound in air=330m s^-1 or 330m/sso distance to reflecting surface=1/5 * 330 as that will give the distance=66.0mSo, distance to reflecting surface is 66.0m
Ans 8:
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Amol Athawale
from
WoodRidge High, aurangabad
Class : Class 6
answer??????????????????????????????????????????????????????
Ans 9:
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Prisha Hemchandra Lokhande
from
NPS Whitefield, Bangalore, Bangalore
Class : Class 8
Is the question wrong...? the answer should be 33.0 m as speed=2d/t