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Vayun from NPS HSR, Bengaluru
Subject :NSO    Class : Class 8

Which of the following shows a pleasant sound?

A
B
C
D


Ans 1:

Student from School, City
Class : Class 8
B and D can also constitute a pleasant sound as they are also similar to A.

Ans 2:

Sherlock Holmes from Baker Street, London
Class : Class 9

Ans 3:

Ayush Pal from GD Goenka Public School Dakshineswar, West Bengal, India, Kolkata
Class : Class 8

Ans 4:

Student from School, City
Class : Class 8

Ans 5:

Vihaan Nair from Ambassador School, DUBAI
Class : Class 8

Ans 6:

Student from School, City
Class : Class 8
Also, B and D can be more musical than A because they change frequently, constituting a pleasant sound, whereas A is a single monotone.

Ans 7:

Advika Narkar from The Shishukunj International School, Jhalaria Campus, Indore
Class : Class 8
This question isn't related to any pleasant or unpleasant sound. Also, if the distance travelled by the sonic vibrations is 2x, time is 2 seconds and speed is 1.5 km/s, the distance= speed*time=1.5*2=3 km. The answer should be 3 km, not 1.5 km. SOF is requested to kindly rectify this error.

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