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  1. What is the minimum escape velocity of rocket to be launched into space ?

    2. A.

     5 Km/Sec.
    B.

     6 Km/Sec.
    C.

     11 Km/Sec.
    D.

     15 Km/Sec.

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    Answer : Option C

    Explanation :

    A spacecraft leaving the surface of Earth, for example, needs to be going about 11 kilometers (7 miles) per second, or over 40,000 kilometers per hour (25,000 miles per hour), to enter orbit. Achieving escape velocity is one of the biggest challenges facing space travel.

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