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July 25, 2014

July 25, 2014

Posted by **Adam** on Monday, April 5, 2010 at 11:04pm.

Estimate by what percentage directly above the pocket of oil would differ from the expected value of for a uniform Earth? Assume the density of oil is .

Express your answer using two significant figures.

- Physics -
**drwls**, Tuesday, April 6, 2010 at 1:55amSubtract from the "normal" value of g the acceleration in the opposite direction due to a hypothetical sphere of negative mass equal to the difference between the mass of earth's crust and the same volume full of oil. This reduction in g will be equal to

a = G (Mcrust-Moil)/(0.55*10^3 m)^2

Insert the appropriate M values for a sphere of earth's crust and a sphere of oil.

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