# hw 1 - homework 01 – HETTIGER CHRISTOF – Due 4:00 am 1...

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Unformatted text preview: homework 01 – HETTIGER, CHRISTOF – Due: Jan 21 2008, 4:00 am 1 Question 1, chap 1, sect 5. part 1 of 1 10 points A block of material has dimensions 4 . 5 cm by 8 cm by 3 . 8 cm. Its mass is 634 g. What is the density? Correct answer: 4 . 6345 g / cm 3 (tolerance ± 1 %). Explanation: Density is mass per unit volume, so ρ = m V = m ℓ w h Question 2, chap 1, sect 6. part 1 of 1 10 points An acceleration of 3 . 6 mi / h / s is equal to: Correct answer: 1 . 609 m / s 2 (tolerance ± 1 %). Explanation: a = 3 . 6 mi / h / s = 3 . 6 mi h · s · 1 . 609km 1 mi · 1000 m 1 km · 1 h 3600 s = 1 . 609 m / s 2 Question 3, chap 1, sect 6. part 1 of 1 10 points Convert 26 . 5 ◦ to radians. Correct answer: 0 . 462512 rad (tolerance ± 1 %). Explanation: Since π rad = 180 ◦ , 26 . 5 ◦ parenleftbigg π rad 180 ◦ parenrightbigg = . 462512 rad . Question 4, chap 1, sect 6. part 1 of 1 10 points A rectangular building lot is 156 ft by 84 . 9 ft. Find the area of this lot in m 2 . Correct answer: 1230 . 45 m 2 (tolerance ± 1 %)....
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hw 1 - homework 01 – HETTIGER CHRISTOF – Due 4:00 am 1...

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