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Unformatted text preview: yoon (jy4326) – HW01 – markert – (58840) 1 This printout should have 21 questions. Multiplechoice questions may continue on the next column or page – find all choices before answering. I shifted the HW due time by 1 day due to Labor Day. Christina 001 (part 1 of 4) 10.0 points How many significant figures are in the fol lowing measurements? a) 78 . 6 ± . 2 m. 1. None of these 2. 2 3. 1 4. 5 5. 3 correct 6. 4 7. 6 Explanation: Addition or subtraction of values measured in tenths of a meter are to be rounded to the nearest tenth of a meter. 002 (part 2 of 4) 10.0 points b) 2 . 566 × 10 21 s. 1. 6 2. 1 3. 3 4. 5 5. 4 correct 6. None of these 7. 2 Explanation: Every digit in scientific notation is signifi cant. 003 (part 3 of 4) 10.0 points c) 3 . 51 × 10 24 kg. 1. 2 2. 1 3. 5 4. 4 5. 6 6. None of these 7. 3 correct Explanation: Every digit in scientific notation is signifi cant. 004 (part 4 of 4) 10.0 points d) 0 . 0052 mm. 1. None of these 2. 5 3. 1 4. 2 correct 5. 4 6. 3 7. 6 Explanation: The first nonzero digit is the first signifi cant digit. 005 10.0 points Convert acceleration of 2 . 7 mi / h / s to m / s 2 . Correct answer: 1 . 20675 m / s 2 . Explanation: Let : a = 2 . 7 mi / h / s . yoon (jy4326) – HW01 – markert – (58840) 2 a = 2 . 7 mi h · s · 1 . 609 km 1 mi · 1000 m 1 km · 1 h 3600 s = 1 . 20675 m / s 2 . 006 (part 1 of 2) 10.0 points The elevators in the John Hancock building in Chicago move 680 ft in 40 s. What is their speed?...
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This note was uploaded on 01/08/2010 for the course CH 53675 taught by Professor Bocknack during the Fall '09 term at University of Texas.
 Fall '09
 BOCKNACK
 Organic chemistry

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