Mercury has a radius of about 0.38 Earth radii and a mass of only 0.055 Earth masses. Estimate the acceleration due to gravity on Mercury.
A. 1.45 m/s2
B. 3.81 m/s2
C. 26.3 m/s2
D. 69.1 m/s2
Answer: B. 3.81 m/s2
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