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Spring 2010 - HW01_Solution

Spring 2010 - HW01_Solution - banuelos(ojb93 Homework 01...

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banuelos (ojb93) – Homework 01 – forin – (58140) 1 This print-out should have 15 questions. Multiple-choice questions may continue on the next column or page – Fnd all choices be±ore answering. 001 (part 1 o± 2) 10.0 points The distance between the sun and the Earth is about 1 . 5219 × 10 11 m. Express this distance with an SI preFx. 1. 1 . 5219 × 10 1 Gm 2. 1 . 5219 × 10 1 Pm 3. None o± these 4. 1 . 5219 × 10 1 Mm 5. 1 . 5219 × 10 1 mm 6. 1 . 5219 × 10 1 Tm correct 7. 1 . 5219 × 10 1 km Explanation: 1 Tm = 1 × 10 12 m , so d = ( 1 . 5219 × 10 11 m ) · 1 Tm 1 × 10 12 m = 1 . 5219 × 10 1 Tm . 002 (part 2 o± 2) 10.0 points Express this distance in kilometers. 1. 1 . 5219 × 10 8 km correct 2. 1 . 5219 × 10 10 km 3. None o± these 4. 1 . 5219 × 10 11 km 5. 1 . 5219 × 10 7 km 6. 1 . 5219 × 10 9 km 7. 1 . 5219 × 10 6 km Explanation: 1 km = 1 × 10 3 m , so d = ( 1 . 5219 × 10 11 m ) · 1 km 1 × 10 3 m = 1 . 5219 × 10 8 km . 003 10.0 points A block o± material has dimensions 4 . 9 cm by 6 . 5 cm by 3 . 3 cm. Its mass is 626 g. What is the density? Correct answer: 5 . 95595 g / cm 3 . Explanation: Let : = 6 . 5 cm , w = 4 . 9 cm , h = 3 . 3 cm , and m = 626 g . Density is mass per unit volume, so ρ = m V = m ℓ w h = 626 g (6 . 5 cm)(4 . 9 cm)(3 . 3 cm) = 5 . 95595 g / cm 3 . 004 10.0 points Convert an acceleration o± 4 . 8 mi / h / s to m / s 2 . Correct answer: 2 . 14533 m / s 2 . Explanation: Let : a = 4 . 8 mi / h / s . a = 4 . 8 mi h · s · 1 . 609 km 1 mi · 1000 m 1 km · 1 h 3600 s = 2 . 14533 m / s 2 . 005 10.0 points Convert 34 . 6 to radians. Correct answer: 0 . 603884 rad.
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banuelos (ojb93) – Homework 01 – forin – (58140) 2 Explanation: Since π rad = 180 , 34 . 6 p π rad 180 P = 0 . 603884 rad .
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Spring 2010 - HW01_Solution - banuelos(ojb93 Homework 01...

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