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A uniform sphere has a mass M and radius...

A uniform sphere has a mass M and radius R. Find the pressure p inside the sphere, caused by gravitational compression, as a function of the distance r from its centre. Evaluate p at the centre of the Earth, assuming it to be a uniform sphere.

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`rho =(3)/(8)[1-(r^(2))/(R^(2))](GM^(2))/(pi R^(4))`
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