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Gravitational acceleration on the surfac...

Gravitational acceleration on the surface of 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 planet is `2/3` times that of the earth. If the escape speed on the surface of the earth is taken to be 11 `km*s^(-1)` , the escape speed on the surface of the planet in `km*s^(-1)` will be

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