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hw1(1) - lenoir(wml297 – homework 01 – Turner –(58220...

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Unformatted text preview: lenoir (wml297) – homework 01 – Turner – (58220) 1 This print-out should have 12 questions. Multiple-choice 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 . 4 cm by 8 . 7 cm by 2 cm. Its mass is 619 g. What is the density? Correct answer: 8 . 08516 g / cm 3 . Explanation: Let : ℓ = 8 . 7 cm , w = 4 . 4 cm , h = 2 cm , and m = 619 g . Density is mass per unit volume, so ρ = m V = m ℓ w h = 619 g (8 . 7 cm)(4 . 4 cm)(2 cm) = 8 . 08516 g / cm 3 . 002 10.0 points Convert an acceleration of 4 . 1 mi / h / s to m / s 2 . Correct answer: 1 . 83247 m / s 2 . Explanation: Let : a = 4 . 1 mi / h / s . a = 4 . 1 mi h · s · 1 . 609 km 1 mi · 1000 m 1 km · 1 h 3600 s = 1 . 83247 m / s 2 . 003 10.0 points Convert 38 . 7 ◦ to radians. Correct answer: 0 . 675442 rad. Explanation: Since π rad = 180 ◦ , 38 . 7 ◦ parenleftbigg π rad 180 ◦ parenrightbigg = . 675442 rad . 004 10.0 points Find the area of a rectangular building lot that is 240 ft by 215 ft. Correct answer: 4793 . 8 m 2 . Explanation: Let : ℓ = 240 ft and w = 215 ft . A = ℓ w = (240 ft) (215 ft) parenleftbigg 12 in 1 ft parenrightbigg 2 × parenleftbigg 2 . 54 cm 1 in parenrightbigg 2 parenleftbigg 1 m 100 cm parenrightbigg 2 = 4793 . 8 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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hw1(1) - lenoir(wml297 – homework 01 – Turner –(58220...

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