Friday, April 20, 2007

Why is the earth round ?

Why is the earth round ? Here is a simple explanation that i found in Feynman's lectures on physics:

It is because of gravitation. Everything attracts everything else. Earth has attracted itself as far as it can. Hence the shape. It is not a perfect sphere as centrifugal forces at the equator makes it a little elliptical.

Interesting!

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