HW 1 Solutions - kim(jkk547 – HW01 – markert –(58840...

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Unformatted text preview: kim (jkk547) – HW01 – markert – (58840) 1 This print-out should have 21 questions. Multiple-choice 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) 65 . 5 ± . 1 m. 1. 1 2. 3 correct 3. 6 4. 2 5. 5 6. None of these 7. 4 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) 3 . 786 × 10 15 s. 1. 5 2. 6 3. None of these 4. 3 5. 2 6. 4 correct 7. 1 Explanation: Every digit in scientific notation is signifi- cant. 003 (part 3 of 4) 10.0 points c) 3 . 58 × 10 11 kg. 1. 4 2. 3 correct 3. 1 4. None of these 5. 2 6. 5 7. 6 Explanation: Every digit in scientific notation is signifi- cant. 004 (part 4 of 4) 10.0 points d) 0 . 0037 mm. 1. 4 2. 5 3. 6 4. 3 5. None of these 6. 2 correct 7. 1 Explanation: The first non-zero 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 . kim (jkk547) – 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 791 ft in 49 s. What is their speed?...
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HW 1 Solutions - kim(jkk547 – HW01 – markert –(58840...

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