National Science Olympiad Forum By SOF Olympiad Trainer - Page 489

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 7

Ans 2:

Class : Class 8

Ans 3:

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 4:

Class : Class 9
the answer is wrong

Ans 5:

Class : Class 4
Answer is wrong

Ans 6:

Class : Class 6

Ans 7:

Class : Class 6
The answer should be 0.2 s

Ans 8:

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

Ans 9:

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

Ans 10:

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.

Ans 11:

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

Ans 12:

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

Ans 13:

Class : Class 7
wrong answer. should be 0.2s

Ans 14:

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

Ans 15:

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

Ans 16:

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 17:

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 18:

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

Ans 19:

Class : Class 8
please explain the answer

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Subject :NSO    Class : Class 5

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 7

Ans 2:

Class : Class 7

Ans 3:

Class : Class 8
option b is the correct answer

Ans 4:

Class : Class 9

Ans 5:

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

Ans 6:

Class : Class 8
option a

Ans 7:

Class : Class 7
Option B

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Subject :NSO    Class : Class 4

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 8

Ans 2:

Class : Class 6
how is this possible

Ans 3:

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 4:

Class : Class 5

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 4

Ans 7:

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

Ans 8:

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 9:

Class : Class 4
b is answer

Ans 10:

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

Ans 11:

Class : Class 6
if the answer is c, then they would have mentioned that it is a lunar eclipse. so it should be b

Ans 12:

Class : Class 9
c

Ans 13:

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 14:

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

Ans 15:

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

Ans 16:

Class : Class 5
The answer is b not c

Ans 17:

Class : Class 6
but how?

Ans 18:

Class : Class 5

Ans 19:

Class : Class 3
C

Ans 20:

Class : Class 8

Ans 21:

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 22:

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

Ans 23:

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 24:

Class : Class 5
It is a full moon and I had enough of your mistakes SOF now, I am going to beat you people.

Ans 25:

Class : Class 5
it is b

Ans 26:

Class : Class 4
only c

Ans 27:

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

Ans 28:

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 29:

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

Ans 30:

Class : Class 7

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Subject :NSO    Class : Class 8

Ans 1:

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

Ans 2:

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 3:

Class : Class 8

Ans 4:

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

Ans 5:

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

Ans 6:

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 7:

Class : Class 9
R is at a slightly higher 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 1
Tides are caused by the gravitational pull of the moon

Ans 2:

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

Ans 3:

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

Ans 4:

Class : Class 7
C

Ans 5:

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

Ans 6:

Class : Class 7

Ans 7:

Class : Class 7
an

Ans 8:

Class : Class 5
C

Ans 9:

Class : Class 9
C for cat

Ans 10:

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

Ans 11:

Class : Class 6
C

Ans 12:

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

Ans 13:

Class : Class 7
The answer is C

Ans 14:

Class : Class 7
c

Ans 15:

Class : Class 7
C

Ans 16:

Class : Class 7

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 7

Ans 2:

Class : Class 7

Ans 3:

Class : Class 7

Ans 4:

Class : Class 6

Ans 5:

Class : Class 6
both option c and d are the same.

Ans 6:

Class : Class 6
i am confused i am confused to opt between C

Ans 7:

Class : Class 3
C and d are same………

Ans 8:

Class : Class 5
fooliesh

Ans 9:

Class : Class 8
????????option C and D?

Ans 10:

Class : Class 5
What is the difference between option C and D

Ans 11:

Class : Class 9

Ans 12:

Class : Class 4

Ans 13:

Class : Class 9
C AND D ARE THE SAME YOU ARE RIGHT

Ans 14:

Class : Class 9
YES

Ans 15:

Class : Class 6

Ans 16:

Class : Class 3
you are right both the options are the same

Ans 17:

Class : Class 8
both c and d are the same ...................... how can they show option d is stapler and seesaw.......

Ans 18:

Class : Class 6
option c

Ans 19:

Class : Class 6
option c

Ans 20:

Class : Class 8
options c and D are same. question needs correction

Ans 21:

Class : Class 6

Ans 22:

Class : Class 8
option D isn't having stapler and seesaw

Ans 23:

Class : Class 7
This question make absolutely no sense.

Ans 24:

Class : Class 5

Ans 25:

Class : Class 7
ya! option C and D are the SAME!

Ans 26:

Class : Class 6
I mean wwwhhhaaattttt???? C AND D ARE SSSAAAMMMEEE!!!!

Ans 27:

Class : Class 7
There's no difference between the option C and D .

Ans 28:

Class : Class 2

Ans 29:

Class : Class 10
OPTION C AND OPTION D ARE SAME .SO IT CAN BE C ALSO .THE QUESTION IS WRONG .THE QUESTION NEEDS CORRECTION ........

Ans 30:

Class : Class 9
option d has the same answer as option c

Ans 31:

Class : Class 8

Ans 32:

Class : Class 7
Master answer needed!

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 6

Ans 2:

Class : Class 3
What Is [ii] ?

Ans 3:

Class : Class 2
1,2,3 are foods sourced roots

Ans 4:

Class : Class 3
B

Ans 5:

Class : Class 5
1,2,3 are sourced from roots.

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