Posted by **Michael Moskvich** on Sunday, April 4, 2010 at 1:31pm.

The center of a 1.40 km diameter spherical pocket of oil is 1.50 km beneath the Earth's surface.

Estimate by what percentage g directly above the pocket of oil would differ from the expected value of g for a uniform Earth? Assume the density of oil is 8.0*10^2kg/m^3.

Express your answer using two significant figures.

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