1.

Gravitational acceleration on the surfaceof a planet is (sqrt(6))/(11) g, where g is the gravitational acceleration on the surface of the earth. The average mass density of the planetis 2/3 times that of the earth.IF the escape speed on the surface of hte earth is taken tobe 11 kms^(-1), the escape speed on the surface of the planet in kms^(-1) will be.

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