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Do you believe the earth is a sphere?

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I cannot prove that the sandwich I am eating is real. Perhaps, it is an illusion or matrix.
On topic: The gravity is same as we travel around the world. If gravity originates from mass density, then it is only constant on the earth surface if the earth is spherical. As in case of spherical body, the surface has a constant distance (radius) from the surface to the centre.
 
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I cannot prove that the sandwich I am eating is real. Perhaps, it is an illusion or matrix.
On topic: The gravity is same as we travel around the world. If gravity originates from mass density, then it is only constant on the earth surface if the earth is spherical. As in case of spherical body, the surface has a constant distance (radius) from the surface to the centre.

Not necessarily. An infinite plane can exert a uniform gravitational force at the surface. Proof:


Sphere? Do you mean round?

Yep. I guess an ellipsoid with near spherical shape.
 
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I think its donut shaped personally....
 
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i think earth is actually a giant .....
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How can a sphere have corners? :D
hmhm.. figuratively yes... :P
Geometrically, however, I am not sure what corner is.. perhaps it is intersection of two lines/dimensions... In that case, sphere can has some corners, according to the need.
 
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