25. A certain spherical asteroid has a mass of 3.5 x 1016 kg and a radius of 8.8 km. What is the minimum speed needed to escape from the surface of this asteroid? (G = 6.67 x 10-11N● m2/kg2)
(A) 223 m/s
(B) 126 m/s
(C) 52 m/s
(D) 34 m/s
(E) 23 m/s.
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統計: A(4), B(0), C(0), D(0), E(12) #3093866
統計: A(4), B(0), C(0), D(0), E(12) #3093866