1.

\[{{v}_{e}}\] and \[{{v}_{p}}\] denotes the escape velocity from the earth and another planet having twice the radius and the same mean density as the earth. Then [NCERT 1974; MP PMT 1994]

A.             \[{{v}_{e}}={{v}_{p}}\]
B.               \[{{v}_{e}}={{v}_{p}}/2\]
C.             \[{{v}_{e}}=2{{v}_{p}}\]
D.               \[{{v}_{e}}={{v}_{p}}/4\]
Answer» C.             \[{{v}_{e}}=2{{v}_{p}}\]


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