National Science Olympiad Forum By SOF Olympiad Trainer - Page 430

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 9
B

Ans 2:

Class : Class 6
I agree with Ira not with Arnav because pulley does not lessen the effort.

Ans 3:

Class : Class 8
B

Ans 4:

Class : Class 10
Single pulley does not provide any mechanical advantage, it only changes the direction of force while an inclined plane provides mechanical advantage. This means the efforts required to life the same amount of load on an inclined plane is lesser than that by a single pulley. (Pulley provides mechanical advantage only if we use more than one pulley).Lesser the inclination more is mechanical advantage and lesser the effort. That means the correct answer should be 'D'

Ans 5:

Class : Class 6
d

Ans 6:

Class : Class 5
B because if we use a rope to pull it will take a lot of effort, if we take a small or large inclined plane it will also take more effort because the load will slip down but in pulley we have to only pull the rope

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Subject :NSO    Class : Class 5

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Subject :NSO    Class : Class 8

Ans 1:

Class : Class 8
The answer is option c

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 6
Of the three mediums, sound waves travel the slowest through gases, faster through liquids, and fastest through solids. Sound waves need a medium to pass through. Liquid molecules are not packed as tightly as solids, and gases are very loosely packed. The spacing of the molecules enables sound to travel much faster through a solid than a liquid or a gas. Sound travels about four times faster and farther in water than it does in air. That means the right answer is Option D.i am the smartest guy in sofi have got once international rank 1in level 2

Ans 2:

Class : Class 5

Ans 3:

Class : Class 6

Ans 4:

Class : Class 5

Ans 5:

Class : Class 3

Ans 6:

Class : Class 5
ans 1 i have got 5 times in level 2 and 9 times in level 1

Ans 7:

Class : Class 7

Ans 8:

Class : Class 5

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 5
B

Ans 2:

Class : Class 4
anser ccccccccccccccccccccccccccccccccccccccccccccccccccccccc

Ans 3:

Class : Class 4
B

Ans 4:

Class : Class 5
the answer is a a a a a a a a!!!!!!!!!!!!

Ans 5:

Class : Class 8
option b is the correct answer

Ans 6:

Class : Class 8
Harsh , the answer is B not A

Ans 7:

Class : Class 6
option B

Ans 8:

Class : Class 4
The correct Option is b

Ans 9:

Class : Class 5
B

Ans 10:

Class : Class 6
B

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 5
C

Ans 2:

Class : Class 5

Ans 3:

Class : Class 4
Option c

Ans 4:

Class : Class 8
the answer is[ A]

Ans 5:

Class : Class 5

Ans 6:

Class : Class 5
snowhite corrrect

Ans 7:

Class : Class 8
The answer is A .......

Ans 8:

Class : Class 7
The answer is option A

Ans 9:

Class : Class 6
option C

Ans 10:

Class : Class 7
c is the right option

Ans 11:

Class : Class 5
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa

Ans 12:

Class : Class 4

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 3
Question in complete

Ans 2:

Class : Class 3

Ans 3:

Class : Class 3
question incomplete

Ans 4:

Class : Class 3

Ans 5:

Class : Class 5
question is incomplete

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 10

Ans 2:

Class : Class 6
p should be pure water and q should be impure water so kindly correct the options

Ans 3:

Class : Class 8
Q should be water salt and P should be pure water

Ans 4:

Class : Class 1
Yes. Even I think that sof here has made a mistake . P and Q should be interchanged . I am reporting this as an error

Ans 5:

Class : Class 10

Ans 6:

Class : Class 6
yes you are right

Ans 7:

Class : Class 6
correct P and Q in the given picture

Ans 8:

Class : Class 9
dumb SOF

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Subject :NSO    Class : Class 8

Ans 1:

Class : Class 10
But gallium is in solid state at room temperature (20oC)

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Subject :NSO    Class : Class 8

Ans 1:

Class : Class 8
Yes. Why does it say that?

Ans 2:

Class : Class 8

Ans 3:

Class : Class 8
Completely agree. ????

Ans 4:

Class : Class 8
in the solution it says that option b is wrong then it says that that the correct option is option b please explain

Ans 5:

Class : Class 8

Ans 6:

Class : Class 8
In solution it is written B is incorrect then HOW THE OPTION 'B' IS COREECT????

Ans 7:

Class : Class 8

Ans 8:

Class : Class 10

Ans 9:

Class : Class 8
In the explanation it is given that option b is wrong. Then how does the OPTION B become the right one ?

Ans 10:

Class : Class 10
why does it say b is wrong(and c is correct) in the solution and that b is the correct answer?Isn't it C?

Ans 11:

Class : Class 9

Ans 12:

Class : Class 9
it says that b is correct and then in soln. it says b is wrong

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