solution_pdf - ebadi(pe2985 Chapter 1 Sherman(74201 This...

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ebadi (pe2985) – Chapter 1 – Sherman – (74201) 1 This print-out should have 10 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. 001 (part 1 of 2) 10.0 points The mean radius of a planet is 6 . 36 × 10 6 m, and that of its moon is 1 . 47 × 10 8 cm. From this data calculate the ratio of the planet’s surface area to that of its moon. Correct answer: 18 . 7189. Explanation: Let : r planet = 6 . 36 × 10 6 m and r moon = 1 . 47 × 10 8 cm = 1 . 47 × 10 6 m . The surface area of a sphere is 4 π R 2 R 2 , so the ratio is A planet A moon = R 2 planet R 2 moon = (6 . 36 × 10 6 m) 2 (1 . 47 × 10 6 m) 2 = 18 . 7189 . 002 (part 2 of 2) 10.0 points Calculate the ratio of the planet’s volume to that of its moon. Correct answer: 80 . 9878. Explanation: The volume of a sphere is 4 3 π R 3 R 3 so the volume ratio is V planet V moon = R 3 planet R 3 moon = (6 . 36 × 10 6 m) 2 (1 . 47 × 10 6 m) 2 = 80 . 9878 . 003 10.0 points Given 1 inch 2 . 54 cm and 1 foot 12 inches, how many square centimeters are in 1 . 54 ft 2 ? 1. 0 . 00165764 cm 2 2. 34 . 3729 cm 2 3. 119 . 226 cm 2 4. 46 . 9392 cm 2 5. 0 . 827955 cm 2 6. 0 . 00421041 cm 2 7. 1430 . 71 cm 2 correct 8. 0 . 0505249 cm 2 Explanation: (1 . 54 ft 2 ) ×
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