ism_ch01 - Chapter 1 Introduction Answers to Even-numbered...

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Chapter 1 Introduction Answers to Even-numbered Conceptual Questions 2. The quantity T + d does not make sense physically, because it adds together variables that have different physical dimensions. The quantity d / T does make sense, however; it could represent the distance d traveled by an object in the time T . 4. (a) Consistent; (b) inconsistent; (c) inconsistent; (d) consistent. 6. (a) 10 7 s; (b) 10,000 s; (c) 1 s; (d) 10 17 s; (e) 10 8 s to 10 9 s. Solutions to Problems 1. (a) 1 9 1 gigadollar $114,000,000 1.14 10 gigadollar 1 10 dollars ×= × × (b) 4 12 teradollar $114,000,000 1.14 10 teradollar 1 10 dollars 1 × × 2. (a) 6 65 10 m (70 m) 70 10 m 7 10 m m µ −−    (b) 9 98 10 km (70 m) 70 10 km 7 10 km m 3. 9 Gm 10 m m 0.3 0.3 10 3 10 m/s sG m s 4. 9 gigacalculations calc 22 second s 1 0 6 93 calc 10 s calc kilocalculations 21 0 0 2 s s s microsecond µµ × = 5. v 2 = 2 ax p , in dimensions 2+ 2 [L ] [L ] [T ] p p == 1 [L ] [L] [T ] [T ] matching exponents gives 1 p p =+ = 1
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Chapter 1: Introduction Physics: An Introduction 6. a = 2 xt p , [L] [T 2 ] in dimensions = [L][T p ] matching exponents gives p = –2 7. v = v 0 + at , in dimensions 2 [L] [L] [L] [T] [T] [T] [T ] =+ [L] [L] [T] [T] 8. Acceleration Force Mass So, F ma and in dimensions 2 [L] [F] [M] . [T ] = 9. 22 2 4 m T k m T k π = = 2 2 4 m k T = , in dimensions 2 [] [T ] k = 10. (a) 3.14 (b) 3.1416 (c) 3.141593 11. 8 3.00 10 m/s × 12. Perimeter 2(Length Width) 2(115.1 m 39.24 m) 2(154.34 m) 308.7 m = += = 13. Total bass rock cod salmon 2.45 lb 10.1 lb 16.13 lb 28.7 lb + = + + = 14. (a) 2 significant figures (b) 4 significant figures 15. A = r 2 (a) (3.1416(5.142 m) 83.06 m A == (b) (3.14)(1.7 m) 9.1 m A 2
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Physics: An Introduction Chapter 1: Introduction 16.
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ism_ch01 - Chapter 1 Introduction Answers to Even-numbered...

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