National Science Olympiad Forum By SOF Olympiad Trainer

# User Forum

Subject :NSO    Class : Class 8

## Ans 1:

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 2:

Class : Class 8
please explain this question

## Ans 3:

Class : Class 8
please explain this question.

## Ans 4:

Class : Class 8
please explain this question.

## Ans 5:

Class : Class 8
Can someone please explain this question?

Class : Class 8

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Subject :NSO    Class : Class 4

Class : Class 4

## Ans 2:

Class : Class 5
the answer is d as the mosquito does not look like the parent , has 3 stages of life and lays eggs while frog does not look like the adult , has 4 stages of life and lays eggs .

Class : Class 5

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Subject :NSO    Class : Class 5

Class : Class 5
ANS A

Class : Class 5
Answer is C

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Subject :NSO    Class : Class 5

## Ans 1:

Class : Class 5
What is the question?????????????????????????????????

## Ans 2:

Class : Class 5
they did not give the question .

Class : Class 5

Class : Class 5

Class : Class 6

## Ans 6:

Class : Class 5
Where is the question? Isn't it very vague?

## Ans 7:

Class : Class 5
The question is incomplete

## Ans 8:

Class : Class 5
where is the question???????????????????????????

## Ans 9:

Class : Class 5
question????????????????

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Subject :NSO    Class : Class 8

## Ans 1:

Class : Class 8
Why does the deviation happen to be 180 degrees

## Ans 2:

Class : Class 8
explain please....

## Ans 3:

Class : Class 6
Thank You Mr.Rahul

## Ans 4:

Class : Class 8
Key Idea: Phenomenon of reflection is independent of medium. The deviation produced by combination of two plane mirrors is Î´=2Ïâ2Î¸ =2Ïâ2ÃÏ2 (Î¸=90o) â Î´=Ï=180o. Hence, total deviation in incident ray is180o

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Subject :NSO    Class : Class 6

Class : Class 7

Class : Class 6
D

Class : Class 6
D

Class : Class 6
Answer can be A

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Subject :NSO    Class : Class 6

## Ans 1:

Class : Class 7
pls explain how the answer is B

## Ans 2:

Class : Class 6
Answer B is the correct answer as the question specified for the arrangement which will allow the bulb to stay lighted for the longest possible time. Option B is connected as One cell as per the circuit (all connections are in parallel), While Option D is in Series (in case of failure of one cell, the circuit will not work as the current will not pass through the cell)

Class : Class 6
Answer is B

Class : Class 6

Class : Class 6
D

## Ans 6:

Class : Class 7
D is the correct answer.

Class : Class 7

## Ans 8:

Class : Class 6
According to me D is the correct answer

## Ans 9:

Class : Class 6
pls explain how the answer is B

## Ans 10:

Class : Class 6
pls explain how the answer is bBTW: your answer is correct

## Ans 11:

Class : Class 6
When a battery is constructed such that all the positive terminal of the cells are connected to a same point and all the negative terminals of the cells are connected to another point then the grouping of cells in this manner is called the Parallel Grouping of cells. The two end terminals of the construct where all the positive and negative terminals of the cells are connected act as the corresponding terminal of the battery.

## Ans 12:

Class : Class 6
According to me D is the correct answer as a wire should be connected from a terminal of a battery to the - terminal of the battery for longer stay of electric circuit, and this rule is satisfied by the circuit shown in option D.

## Ans 13:

Class : Class 6
according to me D is correct

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Subject :NSO    Class : Class 6

## Ans 1:

Class : Class 6
the correct answer is c as it is given weaving fibres not weaving yarn.read the question carefully.

## Ans 2:

Class : Class 1
there is an error. the answer is C

## Ans 3:

Class : Class 6
Both statements are true

Class : Class 7
answer is B

Class : Class 7

Class : Class 5

Class : Class 4
The answer is B

## Ans 8:

Class : Class 6
I think the is option B

Class : Class 6

Class : Class 7

## Ans 11:

Class : Class 7
There seems to be an error in this. We feel that it is B

## Ans 12:

Class : Class 3
Answer is C. As you can't weave fibres.read the question properly!!!!!!!!!!!!!!!

Class : Class 7
The answer is B

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Subject :NSO    Class : Class 3

Class : Class 3
C

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Subject :NSO    Class : Class 7

Class : Class 8
q