phys203 - homework 02_Solutions

phys203 - homework 02_Solutions - Homework 2 1. Aristotles...

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Homework 2 1. Aristotle’s observations to support the notion that the earth is a sphere included the shape of the earth’s shadow on the moon. He noticed that it was curved and so concluded that the earth had to be spherical. Furthermore, he observed that a ship’s hull is the first thing to disappear as it travels further away from shore. Also, Aristotle observed that you can’t see all of the stars in the sky at one position. As you move north the starts that you can see change. If you could see all of the stars from anywhere, the earth would be flat. 2. 3. 1. The hull of a ship disappears before its mast as it travels away from shore 2. The earth’s shadow on the moon is round 3. The rising and setting of stars is different from different places on earth 4. 5. 4. Aristotle contended that the laws of nature operating in the heavens must be different from the laws operating on earth because the he believed that the heavens were constant and unchanging. Circular motion was natural for the heavens, while up and down are the natural motions on earth.
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phys203 - homework 02_Solutions - Homework 2 1. Aristotles...

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