Question: The unexplored planet Alpha Centauri III has a radius of 7.0 10 6 m. A visiting astronaut drops a rock, from rest, into a

The unexplored planet Alpha Centauri III has a radius of 7.0 × 10⁶ m. A visiting astronaut drops a rock, from rest, into a 100 m deep crevasse. She records that it takes 6.0 s for the rock to reach the bottom. What is the mass of Alpha Centauri III?

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