What would be the escape speed in km/s for a fictional planet with the same mass as Earth and is otherwise identical, but with four times its radius?

0 votes
     11.2 km/s
      2.8 km/s
      5.6 km/s
      1.4 km/s
      22.4 km/s
asked Sep 20, 2012 in Astronomy by anonymous
    

1 Answer

0 votes
5.6 km/s
answered Sep 22, 2012 by SkyStar ~Expert~ (2,855 points)

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