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Unformatted text preview: sanchez (ds28677) homework 01 Turner (58220) 1 This printout should have 12 questions. Multiplechoice questions may continue on the next column or page find all choices before answering. 001 10.0 points A block of material has dimensions 4 . 6 cm by 7 . 7 cm by 2 . 8 cm. Its mass is 597 g. What is the density? Correct answer: 6 . 0196 g / cm 3 . Explanation: Let : = 7 . 7 cm , w = 4 . 6 cm , h = 2 . 8 cm , and m = 597 g . Density is mass per unit volume, so = m V = m w h = 597 g (7 . 7 cm)(4 . 6 cm)(2 . 8 cm) = 6 . 0196 g / cm 3 . 002 10.0 points Convert an acceleration of 4 . 9 mi / h / s to m / s 2 . Correct answer: 2 . 19003 m / s 2 . Explanation: Let : a = 4 . 9 mi / h / s . a = 4 . 9 mi h s 1 . 609 km 1 mi 1000 m 1 km 1 h 3600 s = 2 . 19003 m / s 2 . 003 10.0 points Convert 23 . 4 to radians. Correct answer: 0 . 408407 rad. Explanation: Since rad = 180 , 23 . 4 parenleftbigg rad 180 parenrightbigg = . 408407 rad . 004 10.0 points Find the area of a rectangular building lot that is 125 ft by 70 ft. Correct answer: 812 . 902 m 2 . Explanation: Let : = 125 ft and w = 70 ft . A = w = (125 ft) (70 ft) parenleftbigg 12 in 1 ft parenrightbigg 2 parenleftbigg 2 . 54 cm 1 in parenrightbigg 2 parenleftbigg 1 m 100 cm parenrightbigg 2 = 812 . 902 m 2 . Alternate conversions factors are 1 m = 3.281 ft and 0.3048 m = 1 ft, which would also have to be squared....
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 Spring '08
 Turner
 Physics, Work

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