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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 6

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

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Class : Class 5
i think correct answer is C

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Subject :NSO    Class : Class 3

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Subject :NSO    Class : Class 8

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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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Subject :NSO    Class : Class 7

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Class : Class 7
ball 2 as it's parachutes surface area is less

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Class : Class 7
option B is the correct answer

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Subject :NSO    Class : Class 6

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Subject :NSO    Class : Class 8

The given figure shows a typical animal cell with its parts being labelled as 'a - j'. Identify the labelled parts and select the incorrect option regarding it.


A The organelles e, h, g and i are membrane-bound organelles which function in close coordination with one another.
B 'f' organelle is responsible for the synthesis of fats inside the cells and it stores Ca2+ for release during muscle contraction.
C a and b have selective permeability i.e., they allow only selected substances to pass inwardly.
D 'j' is the site for protein synthesis. It allows hereditary message from 'd' to get translated into proteins.


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