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Lab 3 Astronomy Measuring The Size Of The Earth Physics Report
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Asked: Apr 15th, 2019
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Question Description
Lab assignment regarding basic concepts of astronomy.
The lab sheet is short.
Tags: physics physics report APA Formatting Style Basic Concepts Of Astronomy Lab 3 Astronomy Measuring The Size Of The Earth
lab_3.docx
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Astronomy Lab 3 Measuring the Size of the Earth To be completed after reading Arny Chapter 1 Name: _________________ Introduction: By approximately 200 B.C. a Greek scholar named Erastothenes had already come up with an astonishingly accurate calculation of the size of the earth. He knew that at noon on a certain day, shadows in a town a fixed distance south were directly below the objects casting them. He measured the angle of the shadows in his city on that same day, and with that angle, and the distance between the two cities, he was able to compute the size of the earth. In this lab you will calculate the size of the earth using a very similar technique, but using the star Polaris rather than the Sun. Theory: Two cities on the globe, one of which lies directly north of the other, can be idealized and portrayed as simply two points on the edge of a circle with the distance between them being the arc length, s. With this simplification, it is possible to apply the geometrical relationship between the interior angle and the arc length of a circle to calculate the radius of this idealized earth. Once the interior angle, α,
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