Eratosthenes of Cyrene measured a solar shadow at about 7.2o from the perpendicular in a well at Alexandria, Egypt, but no solar shadow (0o from the perpendicular) in a well at Syene, Egypt, 490 miles to the south, at midday on the summer solstice. From these measurements, he was able to calculate: that the circumference of the Earth is about 73,500 miles that the circumference of the Earth is about 61,250 miles that the circumference of the Earth is about 49,000 miles that the circumference of the Earth is about 36,750 miles E. that the circumference of the Earth is about 24,500 miles

Eratosthenes of Cyrene measured a solar shadow at about 7.2o from the perpendicular in a well at Alexandria, Egypt, but no solar shadow (0o from the perpendicular) in a well at Syene, Egypt, 490 miles to the south, at midday on the summer solstice. From these measurements, he was able to calculate: that the circumference of the Earth is about 73,500 miles that the circumference of the Earth is about 61,250 miles that the circumference of the Earth is about 49,000 miles that the circumference of the Earth is about 36,750 miles E. that the circumference of the Earth is about 24,500 miles

Principles Of Radiographic Imaging: An Art And A Science

6th Edition

ISBN:9781337711067

Author:Richard R. Carlton, Arlene M. Adler, Vesna Balac

Publisher:Richard R. Carlton, Arlene M. Adler, Vesna Balac

Chapter8: X-ray Production

Section: Chapter Questions

Problem 7RQ

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