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A rocket is launched from the surface of a planet by giving it an initial velocity of 15,000 m/s. When it is very far away from the planet, its speed is only 2300 m/s. What was the mass of the planet, if its radius is 6500 km?


$7.1 \times 10^{17} kg$


$1.1\times 10^{22} kg$


$1.1\times 10^{25} kg$


The problem cannot be solved without knowing the mass of the rocket.

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