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KISHORE KUMAR E from MAHARISHI INTERNATIONAL RESIDENTIAL SCHOOL, SUNGUVARCHATHIRAM
Subject :NSO    Class : Class 8

Four different whistles, when blown, emit pure notes with the frequencies, 0.1 kHz, 1 kHz, 10 kHz, 100 kHz.
How many of the frequencies are above the normal audible range for humans?
(a) 1
(b) 2
(c) 3
(d) 4


Ans 1:

Rifa Khan from Rps public school , Bhiwadi
Class : Class 8

Ans 2:

Govind Garg from Unknown, MORENA
Class : Class 8
It should be 3 because human ear can hear 20 hz to 20 khz

Ans 3:

Aditya Pisipati from Vikas The concept school, Hyderabad
Class : Class 8
The answer should be 3 because humans can hear sounds ranging from 20 Hz to 20,000 Hz.

Ans 4:

Bhavesh Bhagat from Podar International School Kalyan, Kaylan
Class : Class 10
It should be 3

Ans 5:

Mayank Mishra from Greenfields Public School, Delhi
Class : Class 8
it should be 3

Ans 6:

Govind Garg from Unknown, MORENA
Class : Class 8
Sorry it should be 1

Ans 7:

ALEN from MODEL SCHOOL, Rohtak
Class : Class 8
It should be 3 😡😡

Ans 8:

Rifa Khan from Rps public school , Bhiwadi
Class : Class 8
Yes the answer should be 3 because human's Audible range is fron 20HZ TO 20KHZ.And here10 khz,0.1 khz and 1 khz comes Under this but not 100khzThanks.

Ans 9: (Master Answer)

Admin from revisewise, Noida
Class : Class 1
The correct answer is A.

Ans 10:

ALEN from MODEL SCHOOL, ROHTAK
Class : Class 8
It should be 3

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