# Difference between revisions of "Dictionary:Differential curvature"

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For a gravitational equipotential surface, this is the difference between the curvature of the surface in the direction in which it curves the most and the curvature at right angles to this direction, multiplied by the gravitational constant. Measured by the torsion balance. Also called <b>horizontal directive tendency (HDT)</b>. | For a gravitational equipotential surface, this is the difference between the curvature of the surface in the direction in which it curves the most and the curvature at right angles to this direction, multiplied by the gravitational constant. Measured by the torsion balance. Also called <b>horizontal directive tendency (HDT)</b>. | ||

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## Revision as of 18:46, 13 May 2017

For a gravitational equipotential surface, this is the difference between the curvature of the surface in the direction in which it curves the most and the curvature at right angles to this direction, multiplied by the gravitational constant. Measured by the torsion balance. Also called **horizontal directive tendency (HDT)**.