Question

Why does the earth bulge at the equator?

Answer 1

The earth is spinning as it rotates to give us a 24 hour day. The spin works out to around 1000 MPH or 1600 Km/hour. So the bulge at the center of the earth is due to centifical(sp?) force.

Answer 2

Centrifugal force. :)

Answer 3

centrifugal force is a fictitious force. What is happening is that since the earth itself is not a rigid body it will deform when under motion. Although gravity attempts to make the earth spherical, as it is rotating the earth deforms, in such away that it flattens to become an oblique spheroid. This happens as the material at the equator must have a net resultant centripetal force (not centrifugal) which causes its position of equilibrium from the center of the earth to be further away than at the poles as they do not have this force as they are not rotating around the center of mass.

Answer 4

It is probably because it is warmer there, but don't quote me on it.

Answer 5

Heat expands, cold air diminshes. except for when you boil water.

Answer 6

It is because of the gravitational pull of our lunar moon pulling at the surface and waters of Earth.