# Essay On Oblate Spheroid

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PHY 226 ASSIGNMENT BY OGUNNAIKE FIYINFOLUWA ESTHER INDUSTRIAL PHYSICS; APPLIED GEOPHYSICS 16CE021653 QUESTIONS. Explain with detailed diagrams and illustrations; Hysteresis curves Geotherms Apparent polar wander paths. Explain with diagrams and illustrations; Geoid Oblate spheroids Ellipsoid surface. HYSTERESIS CURVE…show more content…
OBLATE SPHERIOD An oblate spheroid is first a spheroid, which is a quadric surface obtained by rotating an ellipse about one of its principal axes. When the ellipse is rotated on its minor axis it results in an oblate spheroid shaped like a lentil. It has a flattened shape. Because of the effects of gravity and rotation, the shape of the earth and the planets is not sphere, but instead is slightly flattened in the directions of its axis of rotation. For this reason, an oblate spheroid instead of a sphere often approximates the earth. EQUATION OF AN OBLATE SPHERIOD The oblate spheroid is the approximate shape of many planets like Jupiter, Saturn etc. ELLIPSOID SURFACE This surface may be obtained from a sphere by deforming it through directional scaling. It is a quadric surface, a surface defined as the zero set of a polynomial of degree. It is characterized by these two properties; Every planar cross section either is an ellipse or is empty or reduced to a single point, It is bounded; it can be enclosed in a sufficiently large sphere. An ellipsoid has three pairwise perpendicular axes of symmetry, which intersect at a center of symmetry called the center of the