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Re: Re: Re: Earths Gravity.

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Posted by Alexander on February 22, 2001 01:30:20 UTC

Yes, you should as the teacher more details.

If to consider Earth absolutely liquid (or covered by water everywhere), then the surface of Earth (water) is always equipotential, meaning it has the same gravity on water surface everywhere -on both bulges same as on the depressions (otherwise water would immediately flow). And this is not Earth gravity only, but combined gravity of Earth and Moon.

But because the Earth crust is solid, it does not move up as much as water and thus is below equipotential on bulges and above in depressions. Thus the total gravity (Earth + Moon) on the surface of crust should be less on bulges.

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