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Gate-Geology-and-Geophysics-2014-->View question

By:Aparna-Dasgupta

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Fututron

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## The International Gravity Formula predicts the theoretical gravity value at a given point assuming a: (-Gate Geology and Geophysics)

(A) non-rotating homogeneous spherical earth model(B) rotating inhomogeneous spherical earth model

(C) rotating homogeneous oblate spheroidal earth model

(D) rotating inhomogeneous oblate spheroidal earth model

By:Aparna-Dasgupta

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## Answers

(C) rotating homogeneous oblate spheroidal earth model

International Gravity Formula Formula used to determine the gravitational acceleration at a given latitude (g

International Gravity Formula Formula used to determine the gravitational acceleration at a given latitude (g

_{φ}) for a model of the Earth that comprises a rotating, oblate spheroid. g_{φ}= g_{0}(1 + α sin^{2}φ + β sin^{2}Φ), where g_{0}is the value at the equator, of 978.0318 gals, and the constants α and β are 0.0053024 and —0.0000058.Fututron

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