# hw1 - lavallo (jhl936) Homework 01 florin (58140) 1 This...

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Unformatted text preview: lavallo (jhl936) Homework 01 florin (58140) 1 This print-out should have 15 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 distance between the sun and the Earth is about 1 . 5023 10 11 m. Express this distance with an SI prefix. 1. 1 . 5023 10 1 Pm 2. 1 . 5023 10 1 Mm 3. None of these 4. 1 . 5023 10 1 Gm 5. 1 . 5023 10 1 km 6. 1 . 5023 10 1 Tm correct 7. 1 . 5023 10 1 mm Explanation: 1 Tm = 1 10 12 m , so d = ( 1 . 5023 10 11 m ) 1 Tm 1 10 12 m = 1 . 5023 10 1 Tm . 002 (part 2 of 2) 10.0 points Express this distance in kilometers. 1. 1 . 5023 10 9 km 2. 1 . 5023 10 7 km 3. 1 . 5023 10 6 km 4. None of these 5. 1 . 5023 10 11 km 6. 1 . 5023 10 8 km correct 7. 1 . 5023 10 10 km Explanation: 1 km = 1 10 3 m , so d = ( 1 . 5023 10 11 m ) 1 km 1 10 3 m = 1 . 5023 10 8 km . 003 10.0 points A block of material has dimensions 4 . 5 cm by 8 . 3 cm by 4 . 6 cm. Its mass is 629 g. What is the density? Correct answer: 3 . 66102 g / cm 3 . Explanation: Let : = 8 . 3 cm , w = 4 . 5 cm , h = 4 . 6 cm , and m = 629 g . Density is mass per unit volume, so = m V = m w h = 629 g (8 . 3 cm)(4 . 5 cm)(4 . 6 cm) = 3 . 66102 g / cm 3 . 004 10.0 points Convert an acceleration of 2 . 4 mi / h / s to m / s 2 . Correct answer: 1 . 07267 m / s 2 . Explanation: Let : a = 2 . 4 mi / h / s . a = 2 . 4 mi h s 1 . 609 km 1 mi 1000 m 1 km 1 h 3600 s = 1 . 07267 m / s 2 . 005 10.0 points Convert 42 . 1 to radians. Correct answer: 0 . 734784 rad. lavallo (jhl936) Homework 01 florin (58140) 2 Explanation: Since rad = 180 , 42 . 1 parenleftbigg rad 180 parenrightbigg = . 734784 rad ....
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## This note was uploaded on 04/09/2010 for the course PHY 303K taught by Professor Turner during the Spring '08 term at University of Texas at Austin.

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hw1 - lavallo (jhl936) Homework 01 florin (58140) 1 This...

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