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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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The correct Answer is:
`p = 3//8(1-r^(2)//R^(2))GM^(2)//piR^(4)`
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