National Science Olympiad Forum By SOF Olympiad Trainer - Page 547

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 3
A

Ans 2:

Class : Class 6
A

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 7

Ans 2:

Class : Class 7
Given correct answer and explanation do not match...please rectify...

Ans 3:

Class : Class 8
The ans is not matching!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Ans 4:

Class : Class 6

Ans 5:

Class : Class 9
The correct is NSN

Ans 6:

Class : Class 9
please explain. your solution doesn't match the correct answer provided by you.

Ans 7:

Class : Class 4

Ans 8:

Class : Class 7
There is no option only for the answer they had provided us with, gave the correct explanation but the need to correct the answer as well.

Ans 9:

Class : Class 6
The answer does not match with the solution. There should be a change in the answer.

Ans 10:

Class : Class 6
The option selected here is wrong.

Ans 11:

Class : Class 10

Ans 12:

Class : Class 7
they aren't giving the answer and the solution same in some papers

Ans 13:

Class : Class 7
why arent they changing the answer

Ans 14:

Class : Class 9
YES , their answer is not matching with their solution !!

Ans 15:

Class : Class 10
clear objection

Ans 16:

Class : Class 8
Pls rectify.

Ans 17:

Class : Class 3

Ans 18:

Class : Class 6
Although the explanation is correct, it does not match the answer

Ans 19:

Class : Class 3
correct option is C, not B. Please make correction.

Ans 20:

Class : Class 9

Ans 21:

Class : Class 7
Answer and solution are completely different, they are not matching!The solution is correct, but their ans is wrong

Ans 22:

Class : Class 6
yes , its option C

Ans 23:

Class : Class 4
What is this? Answer and solution are completely different, they are not matching!

Ans 24:

Class : Class 5

Ans 25:

Class : Class 3
ayush u are right!!!!!!!!!!!!!!!

Ans 26:

Class : Class 6
NA

Ans 27:

Class : Class 9
yes !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 7

Ans 2:

Class : Class 7
I THINK IT COMPLETES 25 OSCILLATIONS IN 5s

Ans 3:

Class : Class 7
wrong answer. should be 0.2s

Ans 4:

Class : Class 10
According to definition - answer would be 0.2 s

Ans 5:

Class : Class 7
The answer seems to be wrong. 5 seconds to complete 25 oscillations. That means for one oscillation it is 5/25 = 0.2 seconds. 'Period' usually means one complete oscillation that is 0.2 seconds and that is not given.

Ans 6:

Class : Class 7
The swing completes 25 oscillations in 5 seconds So, It will complete 1 oscillation in 5/25 seconds = 0.2 secondsSo, the time period of the swing is 0.2 seconds. Hence, the right answer is Option C.

Ans 7:

Class : Class 10
the answer is wrong , it should be 0.2s. please kindly provide the solution to this question.

Ans 8:

Class : Class 8
please explain the answer

Ans 9:

Class : Class 6

Ans 10:

Class : Class 10
answer is wrong it should be 0.2 s

Ans 11:

Class : Class 8

Ans 12:

Class : Class 7
The time taken to complete one oscillation - a left swing and a right swing - is called the time period (T); it is measured in seconds.A swing takes 5 seconds to complete 25 oscillations. That means it would take 1 second to complete 25 ÷ 5 = 5 oscillations. That also means it would take 1 ÷ 5 = 0.2 seconds to complete 1 oscillation.So, the time period of the swing is 0.2 seconds. Hence, the right answer is Option C.

Ans 13:

Class : Class 4
Answer is wrong

Ans 14:

Class : Class 6
The answer should be 0.2 s

Ans 15:

Class : Class 7
The answer is wrong. It is 0.2

Ans 16:

Class : Class 6
The answer has to be 0.2 seconds(5/25). Pls correct

Ans 17:

Class : Class 9
the answer is wrong

Ans 18:

Class : Class 8
According to definition - answer would be 0.2 s

Ans 19:

Class : Class 8
I think this answer is wrong. It should be 0.2 seconds, according to the definition of a Time Period in oscillatory motion.

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Subject :NSO    Class : Class 5

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 9
i checked in google. ans is a

Ans 2:

Class : Class 9

Ans 3:

Class : Class 7
Option B

Ans 4:

Class : Class 7

Ans 5:

Class : Class 8
option a

Ans 6:

Class : Class 8
option b is the correct answer

Ans 7:

Class : Class 7

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Subject :NSO    Class : Class 4

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 9
c

Ans 2:

Class : Class 5
THE MOON IS NOT STRAIGHT TO THE EARTH. MOON HAS SLIGHT SLANTING REVOLUTION. THAT IS WHY WE HAVE DIFFERENT PHASES OF THE MOON. IF THE MOON IS AT THE POSITION OF..... SUN---EARTH---MOON.......SO THAT WILL BE FULL MOON. FULL MOON IS GIVENN AT OPTION B. SO MOST OF US LIKE ME DID B BUT IT IS SHOWING C AS THE CORRECT ANSWER. BUT AS I THINK THAT EVERYTHING HAS A REASON.1. THE SOLUTION IS THE MEANINGFUL WAY IT IS GOOD. BUT IF YOU OPPOSE THIS, SO 2. THAT THE CHART IS SHOWING THAT....... SUN-----EARTH-----MOON. SO ACCORDING TO THE CHART, IT IS A LUNAR ECLIPSE IN WHICH THE MOON IS COMPLETLY BLACK. SO OPTION C HAS A REASON. SHARE YOUR IDEAS ALSO.

Ans 3:

Class : Class 7

Ans 4:

Class : Class 5
The answer is b not c

Ans 5:

Class : Class 5
According to any phases of the moon diagram, a full moon will be behind the Earth. Even lunar eclipse will be on a full moon day . New moons position will be the opposite of a full moon,i.e. between the earth and sun

Ans 6:

Class : Class 5

Ans 7:

Class : Class 7
It is showing C as the answer to this question

Ans 8:

Class : Class 6
moon does not have its own light it reflects of sun and as it is completely blocked by earth the suns light does not reflect and we do not see any phase of the moon .hence ans is c

Ans 9:

Class : Class 6
how is this possible

Ans 10:

Class : Class 6
Moon will get no sunlight.THIS ISN’T POSSIBLE!!!!!

Ans 11:

Class : Class 5
Full moon occurs when light is spread all over the surface of the moon...but in the picture the moon is blocked by earth and the moon will remain dark.Hence,the answer is (c) new moon

Ans 12:

Class : Class 3
C

Ans 13:

Class : Class 4

Ans 14:

Class : Class 7
It is a full moon and I had enough of your mistakes SOF now, I am going to beat you people.

Ans 15:

Class : Class 8

Ans 16:

Class : Class 6
b) IT SHD BE FULLLLLLLLLLLLLL MOOOOOOOOOOOOOON!?!??!

Ans 17:

Class : Class 5
This is wrong i thinkThe answer should be C

Ans 18:

Class : Class 5
IT SHOULD NOT BE C! B IS THE RIGHT ANSWER. IF SUN EARTH MOON= FULL MOON. IF SUN MOON EARTH = NEW MOON. .

Ans 19:

Class : Class 5
it is b

Ans 20:

Class : Class 5

Ans 21:

Class : Class 6
but how?

Ans 22:

Class : Class 5
This is absolutely incorrect. SOF should verify such answers. The question is about the phase of the moon. Even if it is a lunar eclipse it falls on a full moon day. The answer is B

Ans 23:

Class : Class 1
I think that c is correct as the moon is behind the earth , so there will be no light reaching the moon . Thus, it will be new moon .

Ans 24:

Class : Class 9
How come it is C ? This is insane!!!

Ans 25:

Class : Class 8
It will cause full moon ???

Ans 26:

Class : Class 6
Yes!I checked it on Google!IT IS FULL MOON!!!!!!????

Ans 27:

Class : Class 8

Ans 28:

Class : Class 7
if the answer is c, then they would have mentioned that it is a lunar eclipse. so it should be b

Ans 29:

Class : Class 4
b is answer

Ans 30:

Class : Class 4
only c

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Subject :NSO    Class : Class 8

Ans 1:

Class : Class 8
The three dots are not at the same depth. P and Q are at the same depth, but R is slightly above both of them.

Ans 2:

Class : Class 8
I agree, I feel they are different

Ans 3:

Class : Class 8
r is slightly above them so it has less pressure and there is a block above p so the answer is (C)

Ans 4:

Class : Class 9
R is at a slightly higher depth

Ans 5:

Class : Class 8

Ans 6:

Class : Class 9
doubtthey aren't at the same depthlook carefully sof

Ans 7:

Class : Class 10
yes they aren't at same depth

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 8
THE ANSWER IS B

Ans 2:

Class : Class 5

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 7
The answer is C because tides are caused due to Gravitational pull of moon

Ans 2:

Class : Class 7
C

Ans 3:

Class : Class 5
Gravitational pull of the moon is the correct answer.

Ans 4:

Class : Class 8
correct answer is c graavitional pull by earth

Ans 5:

Class : Class 7
c

Ans 6:

Class : Class 5
the tide happens due to moon's gravity

Ans 7:

Class : Class 7
The answer is C

Ans 8:

Class : Class 7

Ans 9:

Class : Class 7
an

Ans 10:

Class : Class 7
C

Ans 11:

Class : Class 6
C

Ans 12:

Class : Class 1
Tides are caused by the gravitational pull of the moon

Ans 13:

Class : Class 5
My answer is C. I have written it wrong as A

Ans 14:

Class : Class 9
C for cat

Ans 15:

Class : Class 7

Ans 16:

Class : Class 5
C

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