Z1.0 km compared to the gravity field measured at the surface, the one measured at the bottom of a 200 m deep bore hole, through a medium of density d such that

Z1.0 Km Compared to the gravity field measured at the surface, the one measured at the bottom of a 200 m deep bore hole, through a medium of density d such that dG = 0.06 mgals/m, will be: A. larger by 62 mgals B. larger by 38 mgals C. larger by 14 mgals D. smaller by 14 mgals What is the ratio of the Larmor precession frequencies measurable on the Earth's surface at the magnetic latitudes 30° and 60°2 B. 3:V5 A. 2:3 C. V5:V7 D. 7:V13