National Science Olympiad Forum By SOF Olympiad Trainer - Page 577

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Subject :NSO    Class : Class 8

Ans 1:

Class : Class 8
Answer is D

Ans 2:

Class : Class 10
see guys, i think u all are mistaken. We dont consider in what direction the car is going, but in which direction the wheel is turning. for the car to go forwards, the wheel must roll clockwise. so for the car to go east, wheel must roll in the clockwise direction. Now consider a very small part of the wheel which is touching the ground. to wheel to roll in clockwise direction , that small part must slide backward, and that must continously happen in order for wheel to turn clockwise and car to go in east direction. And u know, friction is b/w the surface in contact, i.e the rolling part of the wheel, not with the car. so friction should oppose the backward-going part of the wheel, and thus in the ame direction with the motion of the car. if friction were to be in west, the car would never go in east direction, because the wheel would'nt have any force to oppose, to make it go in that direction, and thus the car would never be able to go towards the east direction!

Ans 3:

Class : Class 8
The answer should be D

Ans 4:

Class : Class 8

Ans 5:

Class : Class 8
the answer has to be d because friction always oppose the relative motion of an object no matter if it accelerates or not.

Ans 6:

Class : Class 8
the answer is D but is given wrong in this question .

Ans 7:

Class : Class 9
The correct answer is d as friction acts opposite to the direction of the applied force

Ans 8:

Class : Class 9

Ans 9:

Class : Class 9
I ALSO THINK THE ANSWER IS D

Ans 10:

Class : Class 7
Answer is d

Ans 11:

Class : Class 8

Ans 12:

Class : Class 9
I'm confused about the same thing...friction opposes relative motion, so it will obviously be towards west??

Ans 13:

Class : Class 9
The answer is A.

Ans 14:

Class : Class 8
How can the direction of friction be towards east? It should always act in the direction opposite to that of the direction of the moving body, i.e., friction should act towards the west irrespective of whether the vehicle is accelerating or retarding. So the correct answer should be D!

Ans 15:

Class : Class 8
Yes answer is D

Ans 16:

Class : Class 8
D

Ans 17:

Class : Class 8
I think that option "D" is the correct answer as friction is always opposite to direction of motion of the object

Ans 18:

Class : Class 10

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 7
C because 25341 spells stick

Ans 2:

Class : Class 7
C

Ans 3:

Class : Class 4
it is wrong

Ans 4:

Class : Class 5
25341

Ans 5:

Class : Class 5
25341

Ans 6:

Class : Class 4
c

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 4

Ans 2:

Class : Class 5
DDD

Ans 3:

Class : Class 5
what they've went and done is put exxxtra optionsss! Real irratating

Ans 4:

Class : Class 4
Explain PleaseI need the explaination

Ans 5:

Class : Class 5
D is the right ansExplanation- LOW VITAMIN A - NIGHT BLINDNESSLOW V. B - BERI BERI

Ans 6:

Class : Class 8

Ans 7:

Class : Class 4

Ans 8:

Class : Class 9
D

Ans 9:

Class : Class 5

Ans 10:

Class : Class 4

Ans 11:

Class : Class 8
d is the right answer

Ans 12:

Class : Class 5

Ans 13:

Class : Class 6
YOU! An admin from Revisewise, you don't even own up to SOF's mistake.Da questions do not show properly and you think I'm responsible!

Ans 14:

Class : Class 4
B is the answer

Ans 15:

Class : Class 5
d

Ans 16:

Class : Class 4
ans was b and i wrote b

Ans 17:

Class : Class 5
d

Ans 18: (Master Answer)

Class : Class 1

Ans 19:

Class : Class 4
CAN SOMEONE EXPAIN?

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 8
BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB

Ans 2:

Class : Class 5
My head is not working and you all are crowding at a simple question! The answer of this question is always bbbbbbbbbbbbbbbbbbbbbb. Are you all are a small kindergarten kids? I think yes. You all are a kids . I think you all will in class 9 or 10. I am sure.

Ans 3:

Class : Class 6

Ans 4:

Class : Class 5
Seen you all later.

Ans 5:

Class : Class 6
SOF Trainer Is Saying Option D But I Think It Is Option C

Ans 6:

Class : Class 8
How a Vineet?

Ans 7:

Class : Class 4

Ans 8:

Class : Class 8

Ans 9:

Class : Class 7
B

Ans 10:

Class : Class 4
Answer has to be option B

Ans 11:

Class : Class 4
Olympiad trainer is saying wrong it would be B bcoz it is 18....

Ans 12:

Class : Class 5
option b

Ans 13:

Class : Class 4
I think it is c.

Ans 14:

Class : Class 7

Ans 15:

Class : Class 3

Ans 16:

Class : Class 4
ans b is the answer......

Ans 17:

Class : Class 4

Ans 18:

Class : Class 4
The answer should be option C

Ans 19:

Class : Class 1
A

Ans 20:

Class : Class 7
d

Ans 21:

Class : Class 5
It's answer should be B option

Ans 22:

Class : Class 7

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Subject :NSO    Class : Class 8

Ans 1:

Class : Class 8

Ans 2:

Class : Class 8
a is answer

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Subject :NSO    Class : Class 8

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 7
would'nt the answer be c ?because kangaroo rats consume water in very limited wayand slow their metablic rate.

Ans 2:

Class : Class 8

Ans 3:

Class : Class 7
c c c c c c c c c c c c c c c c c c c cc c c c c c c c c c c c c it should be c

Ans 4:

Class : Class 3
ANS MUST BE Opt C

Ans 5:

Class : Class 1
THE ANSWER SHOULD BE C !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Ans 6:

Class : Class 4
cccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccc

Ans 7:

Class : Class 3
I have one thing to say the answer is C

Ans 8:

Class : Class 8
I think the answer should be c .

Ans 9:

Class : Class 3
no, I changed my answer there is a misconception that camels drink less water.A camel's water intake varies according to his environment, his exertion level, and the amount of fat in his hump. A thirsty camel can drink more than 30 gallons of water in less than 15 minutes. 1.1 A typical camel can drink 200 liters (53 gallons) of water in three minutes. they drink a lot of water but can also go a long time without drinking water...hope it helps

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 7
it is wrong because north east India receives less rainfall as rajasthan is in north east india

Ans 2:

Class : Class 1
NA

Ans 3:

Class : Class 1

Ans 4:

Class : Class 7

Ans 5:

Class : Class 7
It should be option A

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Subject :NSO    Class : Class 8

Ans 1:

Class : Class 9
Cholera and typhoid

Ans 2:

Class : Class 9
Cholera and typhoid

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 5
t

Ans 2:

Class : Class 7

Ans 3:

Class : Class 3
The correct answer is B.

Ans 4:

Class : Class 3

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