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Unformatted text preview: mughal (kam2843) – Homework 01 – florin – (58140) 1 This printout should have 15 questions. Multiplechoice questions may continue on the next column or page – find all choices before answering. 001 (part 1 of 2) 10.0 points The distance between the sun and the Earth is about 1 . 5102 × 10 11 m. Express this distance with an SI prefix. 1. 1 . 5102 × 10 − 1 Pm 2. 1 . 5102 × 10 − 1 km 3. 1 . 5102 × 10 − 1 Tm correct 4. 1 . 5102 × 10 − 1 Mm 5. 1 . 5102 × 10 − 1 mm 6. None of these 7. 1 . 5102 × 10 − 1 Gm Explanation: 1 Tm = 1 × 10 12 m , so d = ( 1 . 5102 × 10 11 m ) · 1 Tm 1 × 10 12 m = 1 . 5102 × 10 − 1 Tm . 002 (part 2 of 2) 10.0 points Express this distance in kilometers. 1. 1 . 5102 × 10 6 km 2. 1 . 5102 × 10 8 km correct 3. 1 . 5102 × 10 9 km 4. 1 . 5102 × 10 7 km 5. None of these 6. 1 . 5102 × 10 11 km 7. 1 . 5102 × 10 10 km Explanation: 1 km = 1 × 10 3 m , so d = ( 1 . 5102 × 10 11 m ) · 1 km 1 × 10 3 m = 1 . 5102 × 10 8 km . 003 10.0 points A block of material has dimensions 4 . 8 cm by 7 . 8 cm by 4 cm. Its mass is 596 g. What is the density? Correct answer: 3 . 9797 g / cm 3 . Explanation: Let : ℓ = 7 . 8 cm , w = 4 . 8 cm , h = 4 cm , and m = 596 g . Density is mass per unit volume, so ρ = m V = m ℓ w h = 596 g (7 . 8 cm)(4 . 8 cm)(4 cm) = 3 . 9797 g / cm 3 . 004 10.0 points Convert an acceleration of 4 mi / h / s to m / s 2 . Correct answer: 1 . 78778 m / s 2 . Explanation: Let : a = 4 mi / h / s . a = 4 mi h · s · 1 . 609 km 1 mi · 1000 m 1 km · 1 h 3600 s = 1 . 78778 m / s 2 . 005 10.0 points Convert 44 . 4 ◦ to radians. Correct answer: 0 . 774926 rad. mughal (kam2843) – Homework 01 – florin – (58140) 2 Explanation: Since π rad = 180 ◦ , 44 . 4 ◦ parenleftbigg π rad 180 ◦ parenrightbigg = . 774926 rad ....
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This note was uploaded on 02/03/2010 for the course PHY 303K taught by Professor Turner during the Spring '08 term at University of Texas at Austin.
 Spring '08
 Turner
 Physics, Work

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