HW__1_F05[1] - Physics 112 Read Chapter 1 sections 1.1 1.7...

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Physics 112 Homework #1 Fall 2005 Read: Chapter 1, sections 1.1 - 1.7 For study/discussion: Chap. 1: Q's #Q1.2, Q1.2, Q1.3, Q1.5, Q1.8, Q1.10, Q1.12, Q1.13, (not turned in) Q1.17, Q1.18; Due Fri., Sept. 2 at lecture: *** ON EACH HW ASSIGNMENT: Be sure to show and organize all your work neatly for problems, rather than just giving answers. Be sure to put on your HW paper: (1) your name, (2) your recitation section number, and (3) your recitation instructor's name. *** #1.10 [Unit Conversions] Be sure to show your calculations clearly. #1.12 Be sure to express your answer using the correct number of significant digits , based on the information given. #1.15 [Measurement Uncertainty] Please show your reasoning and calculations. #1.32 [Vectors] Be sure to draw your vector diagrams carefully with a ruler & protractor . 1. The Greek scholar Eratosthenes measured the circumference of the Earth sometime around the year 230 BC (!). He used the following information: At noon on the first day of summer in the town of Syene (now Aswan) in Egypt, the Sun was directly overhead in the sky. At the same time in the town of Alexandria directly north of Syene, Eratosthenes observed the shadow cast by a vertical stick in the ground and deduced that the Sun was about 7° away from being directly overhead. The distance between Alexandria and Syene along the ground had been measured to be
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HW__1_F05[1] - Physics 112 Read Chapter 1 sections 1.1 1.7...

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