Weight and g: Planet Z-34 has a mass equal to one-third that of Earth and a radius equal to one-third that of Earth. With g representing, as usual, the acceleration due to gravity at the surface of Earth, the acceleration due to gravity at the surface of Z-34 is
A. g/3.
B. 3g.
C. 6g.
D. g/9.
E. 9g.
Answer: B
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