what's the diff between the distance from Earth's core to: a) equatorial sea level and b) polar sea level?

Question

How much is the difference?
Is the difference caused by the centrifugal force of the rotation (spinning) of the Earth?
Will the difference increase as sea levels rise due to global warming?
How much?

Answer 1

The polar radius of the earth is 6,356.77 kilometers as opposed to the equatorial radius is 6,378.17 kilometers - a difference of 21.4 kilometers. the difference is due to centrifugal forces created by the earths rotation about its axis- ( approximately 1669.354 km per hour.) Obviously these distances will increase as sea-level increases. How much by will depend on the rapidity of global warming.