Assertion :Chandrayan I (India Ist lunar spacecraft) can be made to orbit at an altitude 15 km from moon's surface. Reason: The moon has no atmosphere, a body can orbit at an altitude where it clears the mountains as long as it has sufficient speed.

Statement-1 is false, statement-2 is true

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Statement-1 is true, statement-2 is false

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Statement-1 is true, statement-2 is true,statement-2 is a correct explanation for statement-1

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Statement-1 is true, statement-2 is true, statement-2 is not a correct explanation for statement-1

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Solution

The correct option is D Statement-1 is true, statement-2 is true, statement-2 is not a correct explanation for statement-1
Chandrayan I can indeed be made to orbit at an altitude 15 km from moon's surface.
So statement 1 is true.
The moon has no atmosphere. A body can orbit at an altitude where it clears the mountains as long as it has sufficient speed.
statement - 2 is also true.
But the correct explanation of statement - 1 is that, the mass of moon is very small compared to earth, and so any spacecraft
with enough speed can be kept moving in an orbit of an altitude 15 km from moon's surface
So statement - 2 is not a correct explanation for statement -1

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Similar questions

- 1 :

0 < x < y \Rightarrow {log}_{a} x > {log}_{a} y

a > 1

- 2 :

a > 1, {log}_{a} x

C_{r m s} = \sqrt{\frac{3 P V}{M}}

\sum_{r = 0}^{n} (r + 1)^{n} C_{r} = (n + 2) 2^{n - 1} .

\sum_{r = 0}^{n} (r + 1)^{n} C_{r} x^{r} = (1 + x)^{n} + n x (1 + x)^{n - 1} .

\sum_{r = 0}^{n} (r + 1)^{n} C_{r} = (n + 2) 2^{n - 1} .

\sum_{r = 0}^{n} (r + 1)^{n} C_{r} x^{r} = (1 + x)^{n} + n x (1 + x)^{n - 1} .

n

(7 n + 1) : (4 n + 17)

n^{t h}

7 : 4

S_{n} = a n^{2} + b n + c,

T_{n} = S_{n} - S_{n - 1}

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