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The spacecraft to travel to the outer sp...

The spacecraft to travel to the outer space, must have

A

minimum velocity of 22.4 km/s

B

maximum velocity of 11.2km/s

C

minimum velocity of 11.2km/s

D

maximum velocity of 22.4 km/s

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Complete the passage using the following terms and rewrite it. Space travellers as well as objects in the spacecraft appear to be …………. (a) …………. . Though the spacecraft is at a height from the surface of the earth, the value of 'g' there is not zero. In the space station the value of 'g' is only 11% ........... (b) .......... than its value on the surface of the earth. Thus, the .......... (c) ............ of a spacecraft is not the reason for their weightlessness. Their weightlessness is caused by their being in the ......... (d) Though the spacecraft is not falling on the earth because of its velocity along the orbit, the only force acting on it is the ............ (e) ............ of the earth and therefore it is in a free fall. As the velocity of free call ......... (f) ........... on the properties of an object, the velocity of free fall is the ............ (g) ........... for the spacecraft, the travelers and the objects in the craft. Thus, if a traveller releases an object from her hand , it will remain ........... (h) ............ with respect to her and will appear to be ........ (i) .......

First Indian to travel to space.

Knowledge Check

  • Statement-1: It takes more fuel for a spacecraft to travel from the earth to moon than for the return trip. Statement-2: Potential energy of spacecraft at moon's surface is greater than that at earth surface.

    A
    Statement-1 is true, statement-2 is true and statement-2 is correct explanation for statement-1.
    B
    Statement-1 is true, statement-2 is true and statement-2 is NOT the correct explanation for statement-1.
    C
    Statement-1 is true, statement-2 is false.
    D
    Statement -1 is false, statement -2 is true.

  • Statement - 1 : It takes more fuel for a spacecraft to travel from the earth to moon than for the return trip. Statement - 2 : Potential energy of spacecraft at moon's surface is greater than at earth surface.

    A
    Statement -1 is true, statement-2 is true and statement -2 is correct explanation for statement -1.
    B
    Statement -1 is true, statement -2 is true and statement -2 is correct explanation for statement -1.
    C
    Statement -1 is true, statement -2 is false.
    D
    Statement -1 is false, statement -2 is true.

  • A nucleophile must have :

    A
    a negative charge
    B
    a positive charge
    C
    a lone pair of electron
    D
    an electron deficient centre

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