(C) F=gm1m2/r2. Mass of Earth 5.9x1024 kg; average density 5.5 g/cm3 or 5500 kg/m3
(D) You would measure a higher g at Fisherman's Wharf because it is closer to the center of the Earth, but the isostatic residual gravity anomaly value is lower there than at Mt. Diablo because Fisherman's Wharf is underlain by rocks of lower density.
(E) You weigh more at the poles because d is smaller. You would weigh less in space because the airplane is closer to the center of the Earth.
(F) The ball would drop faster on the mountain made of gold. Gold is denser than styrofoam and therefore has more mass.
(G) Low gravity values over sedimentary rocks. Probably not over the Bay because of possible salt water contamination.
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