National Science Olympiad Forum By SOF Olympiad Trainer - Page 143

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Subject :NSO    Class : Class 7

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 7
The earth's north pole acts like a south pole to the magnet as it attracts the north pole of a magnet (The earth's north pole attracts the north pole of a magnet). This means that the needle of a compass is always the north pole. So, the needle will point to the south pole of the other magnet. In simple words, the North pole of the earth is actually the south pole for a magnet.

Ans 2:

Class : Class 6
shall be BBBBBBBBBBBBBBBBBBBBBBBBBBB

Ans 3:

Class : Class 6

Ans 4:

Class : Class 6

Ans 5:

Class : Class 6
The needle should point towards South pole because the Earth's North Pole is actually the South pole of a bar magnet. Compass needle always points to the geographical North pole.

Ans 6:

Class : Class 6
But a compass always points to the magnetic north pole, not geographic north pole right?

Ans 7:

Class : Class 8

Ans 8:

Class : Class 6
Shouldn't the correct answer be (A), since a compass needle ALWAYS points in the North Direction? Pls Help.

Ans 9:

Class : Class 6
it should be ccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccc

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Subject :NSO    Class : Class 8

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Subject :NSO    Class : Class 6

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 7
Tis is not in synopsis

Ans 2:

Class : Class 7
@ Rachita Gupta-I don't know I'm confused now.

Ans 3:

Class :
Please give more questions like this

Ans 4:

Class : Class 7
The answer should be 9

Ans 5:

Class : Class 6
answer is 9

Ans 6:

Class : Class 8
Does anyone understand this?

Ans 7:

Class : Class 2
12-5 =7 7 2=9answer is 9

Ans 8:

Class : Class 8
Correct answer is 9m. Already explained in olympaid prep-guide book.

Ans 9:

Class : Class 6
The answer should be 9m as 12 2=14-5=9

Ans 10:

Class : Class 6
explain

Ans 11:

Class : Class 6

Ans 12:

Class : Class 6

Ans 13:

Class : Class 6
please explain

Ans 14:

Class : Class 6
9 should be the answer

Ans 15:

Class : Class 6
Here it is asking how far away boy Y would APPEAR to be in the mirror to boy X, as in, from boy X's perspective. Y is 12 m away from the MIRROR. He moves 5 m closer12-5=7This is where confusion may set in. A lot of people have added X's distance from the mirror(2 m)7 2=9Here, we are getting the total as 9 m.. However, it is also necessary to add 2 m for the reflected ray to travel to X so that he can see the image.9 2=11Hence, the answer is 11 m.

Ans 16:

Class : Class 6

Ans 17:

Class : Class 6

Ans 18:

Class : Class 7
It's nine.

Ans 19:

Class : Class 7

Ans 20:

Class : Class 7
it is 9m as 12m - 5m = 7m , 7m 2m = 9m , kindly the correct answer is 9m .

Ans 21:

Class : Class 7
the distance in the mirror of boy y would be 9m but distance from mirror to boy x would be 9 plus 2= 11

Ans 22:

Class : Class 7

Ans 23:

Class : Class 6

Ans 24:

Class : Class 6
How 11cm

Ans 25:

Class : Class 7
Kindly explain.......

Ans 26:

Class : Class 8

Ans 27:

Class : Class 7
Yes austin

Ans 28:

Class : Class 2
12-5=77*2=14that should be the answer

Ans 29:

Class : Class 8
Can anyone please explain?

Ans 30:

Class : Class 7
answer should be 9

Ans 31:

Class : Class 6
Should be ( as 12 2

Ans 32:

Class : Class 8
Please explain

Ans 33:

Class : Class 7
@Rachita Gupta- They are asking how far away boy-y would appear to be from BOY-X not the mirror so I'm guessing it should be 9m.

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Subject :NSO    Class : Class 2

Ans 1:

Class : Class 5
It is so easy

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Subject :NSO    Class : Class 10

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Subject :NSO    Class : Class 8

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Subject :NSO    Class : Class 4

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Subject :NSO    Class : Class 2

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