| Papers [1-2] of 2 | Search results on "ERATOSTHENES MEASUREMENT": |
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Eratosthenes and Measurement, 2006.
A biographical account of the life of Greek scholar Eratosthenes and his many contributions to the sciences.
1,350 words (approx. 5.4 pages), 3 sources, $ 53.95
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Abstract
This six page paper looks closely at the ancient and historical figure of Eratosthenes, who died around 195 BC. He made many significant contributions to the fields of science, mathematics, astronomy, geography, and many others. His discovery of the diameter of the earth has been proven to be highly accurate today. As thus, his work is of lasting importance.
From the Paper
"Eratosthenes, a Greek scholar from about 276-195 B.C, is remembered chiefly for his scientific measurements of the earth's circumference. His work, albeit somewhat unacknowledged by his contemporaries, resulted in fantastic scientific experiments which are comparably accurate even today. By looking briefly at his biography, and then the results of his experiments, Eratosthenes will be shown to be both a highly important as well as a highly innovative thinker of his age, regardless of how he was considered at the time of his life work. Born in North Africa, Cyrene, Eratosthenes spent much of his educational time in Athens. In Athens he received the education..."
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Earth's Diameter, 2002.
An insight in how to measure the diameter of the Earth.
915 words (approx. 3.7 pages), 2 sources, MLA, $ 32.95
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Abstract
This paper describes Eratosthenes' calculation of the Earth's diameter, based on one assumption and two measurements, that the Earth was a sphere and that the two measurements made are the degree of the Earth's shadow at noon at two points and the distance between those points. It outlines how this experiment can be repeated by measuring the degree of the shadows cast at two locations either directly north or south of each other at noon on the same day and details the equipment required, the measurements to be taken and the mathematical equations involved.
From the Paper
"Eratosthanes used the city of Syene in Egypt as the first point. This point was selected because it was known that on noon on the first day of summer the sun was directly overhead. This was known because people observed that at this time, the buildings cast no shadows (York University). Therefore, the degree of the shadow at Syene was 0o.
Eratosthanes then needed to know the degree of the shadow at another point either directly north or directly south, at the same time of day. Eratosthanes selected Alexandria as the second city. The degree of the sun's shadow was measured and found to be 7.2o (HEASARC)."
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