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Here you will find a listing of essential facts about the planet earth, the home to all of humanity: ... Earth's Diameter at the Equator: 7,926.28 miles (12,756.1 km) ... What is the diameter of the earth?
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geography.about.com/od/learnabouttheearth/a/earthfacts....
geography.about.com/od/learnabouttheearth/a/earthfacts.htm
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One of my sources stated that the equatorial diameter is 40 kilometers wider than the polar diameter. The Earth is not a perfect sphere because of a bulge in the equator. Most of the current knowledge of the Earth has been collected in three methods, through satellites, telescopes and outer space exploration.
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hypertextbook.com/facts/1999/RicardoMartinez.shtml
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Eratosthenes's 2200 year old calculation of Earth's size ... Today, we measure the earth. The University of Houston's College of Engineering presents this series about the machines that make our civilization run, and the people whose ingenuity created them. ... No. 1457: ERATOSTHENES'S DIAMETER OF EARTH...
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www.uh.edu/engines/epi1457.htm
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The diameter of the earth at the equator is 12,756.32 kilometers or 7,926.41 miles. The diameter of the earth through the poles is 12,715.43 km or 7,901.000 miles. Thus the earth is 41 km or 25 miles wider than it is tall, giving it a sligh...
http://wiki.answers.com/Q/What_is_the_diameter_of_the_E...
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A bit for drilling large-diameter holes. Cutters are arranged in a staged configuration around a central shaft. The innermost cutters are the same large cutters used at other locations on the ... This invention relates to the art of earth boring and more particularly to an improved bit for drilling large-diameter holes.
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www.freepatentsonline.com/3633691.html
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3. A variable diameter earth boring bit adapted to be connected in a drill string for cutting a shaft in the earth, comprising: ... Large diameter earth boring bits are presently used in the mining and construction industries which vary in overall diameter from between about 2-3 feet to 20 feet or more in diameter.
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www.freepatentsonline.com/4448270.html
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Estimate the diameter and circumference of the Earth ... Eratosthenes Finds Diameter of Earth! ... Find the radius and diameter of the earth: (use C = 2*Pi*r );
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outreach.as.utexas.edu/marykay/assignments/eratos1.html
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Looking Inside Earth; Although the interior of Earth is only a few tens of miles beneath our feet, it is more difficult to reach than the surface of Pluto or even a nearby star! The deepest mines in the world are only three to four kilometers deep.
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www.cotf.edu/ete/modules/volcanoes/vinside.html
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