![]() ![]() The actual depth dependence of density and gravity, inferred from seismic travel times (see Adams–Williamson equation), is shown in the graphs below. ![]() ![]() It is a vector quantity, whose direction coincides with a plumb bob and strength or magnitude is given by the norm g = ‖ g ‖ Laser Level, RockSeed 100 Feet Cross Line Laser with Self-Leveling, Vertical and Horizontal Line, Rotatable 360 Degree, Carrying Pouch, Battery Included (Red) 8,102. The gravity of Earth, denoted by g, is the net acceleration that is imparted to objects due to the combined effect of gravitation (from mass distribution within Earth) and the centrifugal force (from the Earth's rotation). Screw top simplifies attachment of string to center of the plumb. Red shows the areas where gravity is stronger than the smooth, standard value, and blue reveals areas where gravity is weaker. Top 5 Best Plumb Bob Laser of June 2023 1 Johnson Johnson Level & Tool 08 Steel Hexagonal Plumb Bob, 8 oz., Steel Finish, 1 Pack 9.9 More Info 2 Rack-A-Tiers Rack-A-Tiers 88455 Self Levelling Magnetic Damping Laser Plumb Bob 9.8 More Info 3 Stabila Stabila LA-5P Laser Bob 5 Point Laser 9. Brass plumb bob ideal for use in framing, deck building, plumbing, transit location and construction applications. Earth's gravity measured by NASA GRACE mission, showing deviations from the theoretical gravity of an idealized, smooth Earth, the so-called Earth ellipsoid. ![]()
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