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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 4

Ans 2:

Class : Class 9
i am lipi sanwal from S.H.I.S , GURUGRAMat first I reported a error in the question but after wards I understood iiiiiiiiittttt !

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 3
C

Ans 2:

Class : Class 3
C

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 7
Option C

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Class : Class 6
the correct option is 'C' BECAUSE SUGAR IS A SOLID SO WHEN THE LIQUID IS HEATED IT EVAPORATES LEAVING THE SUGAR BEHIND

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 7

Ans 2:

Class : Class 6
C is the answer, as in each of these processes, the heat is absorbed.

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 5
i think correct answer is C

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 3

Ans 2:

Class : Class 3

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Subject :NSO    Class : Class 8

Ans 1:

Class : Class 9

Ans 2:

Class : Class 8
C as the scale is 1:0.05

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Subject :NSO    Class : Class 8

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Subject :NSO    Class : Class 9

Kepler's third law states that square of period of revolution (T) of a planet around the sun is proportional to third power of average distance r between the sun and the planet i.e. T2 = Kr3 (here K is constant). If the masses of sun and planet are M and m respectively then as per Newton's law of gravitation, force of attraction between them is F = GMm/r2, here G is gravitational constant.
The relation between G and K is described as

A K = G
B K = 1/G
C GK = 4π2
D GMK = 4π2


Ans 1:

Class : Class 9
Correct ans:D. The gravitational force is equal to the centripetal force acting between the Sun and Planet. GMm/r^2=Mv^2/r =>v^2=Gm/r. Also,T=2(pi)r/v. Squaring both the sides we will get

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Subject :NSO    Class : Class 9

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