Jan 25, 2013

Shape of the Earth

When thinking of geo stuff, it is interesting to note that the earth is not round. Most people know this, but did you know you weigh more or less depending on where you live?

The Earth’s shape is classified as an oblate spheroid or ellipsoid. The polar diameter of the Earth is about 26.7 miles (43 km) shorter than its equatorial diameter causing a difference of about 0.3%. This very slightly oblate shape affects the weight of an object according to its position on the Earth’s surface. A 20-lb bag of sand would weigh less at the equator than at the North Pole. This is because the further an object gets from the center of the Earth, the less it weighs. Maybe I might move to the equator.

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