Fundamentals of Physics

Answers

to Checkpoints and Odd-Numbered Questions and Problems

chapter 1

P

1. (a) 160 rods; (b) 40 chains

3. (a) 10⁹ μm; (b) 10⁻⁴; (c) 9.1 × 10⁵ μm

5. (a) 4.00 × 10⁴ km; (b) 5.10 × 10⁸ km²; (c) 1.08 × 10¹² km³

7. 1.9 × 10²² cm³

9. 1.1 × 10³ acrefeet

11. 1.21 × 10¹² μs

13. C, D, A, B, E; the important criterion is the consistency of the daily variation, not its magnitude

15. (a) 1.43; (b) 0.864

17. (a) 495 s; (b) 141 s; (c) 198 s; (d) −245 s

19. (a) 1 × 10³ kg; (b) 158 kg/s

21. 9.0 × 10⁴⁹ atoms

23. (a) 1.18 × 10⁻²⁹ m³; (b) 0.282 nm

25. (a) 22 pecks; (b) 5.5 Imperial bushels; (c) 200 L

27. ≈ 1 × 10³⁶

29. (a) 18.8 gallons; (b) 22.5 gallons

31. (a) 14.5 roods; (b) 1.47 × 10⁴ m²

33. 0.260 kg

35. (a) 11.3 m²/L; (b) 1.13 × 10⁴ m⁻¹; (c) 2.17 × 10⁻³ gal/ft²; (d) number of gallons to cover a square foot

37. 0.3 cord

39. (a) 3.9 m, 4.8 m; (b) 3.9 × 10³ mm, 4.8 × 10³ mm; (c) 2.2 m³, 4.2 m³

41. (a) 293 U.S. bushels; (b) 3.81 × 10³ U.S. bushels

43. 2 × 10⁴ to 4 × 10⁴ dbugs

45. (a) 3 nebuchadnezzars, 1 methuselah; (b) 0.37 standard bottle; (c) 0.26 L

47. 0.12 AU/min

49. 6.0 × 10²⁶ atoms

51. 3.8 mg/s

53. 1.2 m

55. 10.7 habaneros

57. (a) 4.9 × 10⁻⁶ pc; (b) 1.6 × 10⁻⁵ ly

59. (a) 400; (b) 6.4 × 10⁷

chapter 2

CP

1. b and c

2. zero (zero displacement for entire trip)

3. (check the derivative dx/dt) (a) 1 and 4; (b) 2 and 3

4. (see Tactic 5) (a) plus; (b) minus; (c) minus; (d) plus

5. 1 and 4 (a = d²x/dt²) must be a constant)

6. (a) plus (upward displacement on y axis); (b) minus (downward displacement ...