Fysik (TFYA14)
Svar på Questions och Problems i Halliday ed. 10
Kap. 15
Questions:
3. (a) 2; (b) positive; (c) between 0 and +xm
4. c
10. one system : k = 1500 N/m, m = 500 kg; other system: k = 1200 N/m, m = 400 kg
11. (a) greater; (b) same; (c) same; (d) greater; (e) greater
12. (a) −π, −180; (b) −π/2, −90; (c) +π/2, +90
Problems:
5. (a) 0.350 s; (b) 2.86 Hz; (c) 18.0 rad/s; (d) 161 N/m; (e) 6.28 m/s; (f) 56.4 N
11. (a) Fm/bω; (b) Fm/b
14. 11.4 Hz
15. (a) 1.0 mm; (b) 0.63 m/s; (c) 3.9×102 m/s2
22. (a) 1.87 × 105 N/m; (b) 2.74 Hz
23. (a) -2.44 m; (b) −51.7 m/s; (c) 218 m/s2; (d) 20.8 rad; (e) 1.5 Hz; (f) 0.67 s
29. 7.8 cm
35. (a) 2.25 Hz; (b) 80.0 J; (c) 250 J; (d) 81.2 cm
40. 1.58 h
57. (a) 0.84; (b) 0.16; (c) ±𝑥𝑚 /√2
Kap. 16
Questions:
2. (a) 4; (b) 4; (c) 3
3. a, upward; b, upward; c, downward; d, downward; e, downward; f, downward; g, upward; h,
upward
6. a and d tie, then b and c tie
8. (a) node; (b) antinode
9. d
Problems:
6. (a) 130; (b) 2.26 rad; (c) 0.360 wavelength
11. 0.91ym
17. (a) 158 m/s; (b) 60.0 cm; (c) 264 Hz
19. (a) 1.50 Hz; (b) 2.00 m; (c) 3.00 m/s; (d) 50.0 cm; (e) 150 cm; (f) 250 cm; (g) 0; (h) 100 cm; (i)
200 cm
23. (a) 15 m/s; (b) 0.043 N
25. (a) 150 Hz; (b) 225 m/s (Obs! Frekvensen 308 Hz ska ändras till 300 Hz!)
29. (a) 3.0 mm; (b) 16 m−1; (c) 3.1 × 102 s−1; (d) negative sign
37. 4.5 cm
42. (a) 3.0 cm; (b) 1.0 × 102 cm; (c) 2.0 Hz; (d) 2.0 × 102 cm/s; (e) +x direction; (f) 38 cm/s; (g) −0.28
cm
47. 68
55. (a) 5.0 cm ; (b) 40 cm; (c) 11.3 m/s; (d) 0.035 s; (e) 9.0 m/s; (f) 16 m−1; (g) 1.8 × 102 s−1; (h) 0.93
rad; (i) positive sign
Kap. 17
Questions:
2. (a) 2.0 wavelengths; (b) 1.5 wavelengths; (c) fully constructive in (a), fully destructive in (b)
3. A and B tie, then C
6. all odd harmonics
8. (a) 3, then 1 and 2 tie; (b) 1, then 2 and 3 tie; (c) 3, 2, 1
Problems:
7. 0.027
17. (a) 1.0 × 104; (b) 100
19. (a) 7.37 × 10−5 W/m2; (b) 5.5 nW
22. (a) 286 Hz; (b) 1.04 kN
23. 2.2 × 103 km
31. (a) 1595 Hz; (b) 1630 Hz
32. 2.0
46. 8.96 m/s
49. (a) 18; (b) 16
50. (a) 0.80 nm; (b) 7.5 nW/m2
51. (a) 86 Hz; (b) 3; (c) 5; (d) 172 Hz; (e) 2; (f) 3
56. (a) 95 Hz; (b) yes, low frequency; (c) higher
57. (a) 363 Hz; (b) 3; (c) 5; (d) 726 Hz; (e) 2; (f) 3
62. (a) 2.00 Pa; (b) 225 Hz; (c) 2.22 m; (d) 500 m/s
63. 9.66 m
Kap. 18
Questions:
1. c, then the rest tie
6. (a) all tie; (b) all tie
7. (a) both clockwise; (b) both clockwise
8. (a) cycle 2; (b) cycle 2
9. (a) greater; (b) 1, 2, 3; (c) 1, 3, 2; (d) 1, 2, 3; (e) 2, 3, 1
11. c, b, a
Problems:
3. (a) 13 kW/m2; (b) 0.11 kW/m2
7. (a) 12 cal; (b) −86 cal; (c) 80 cal; (d) 36 cal; (e) 36 cal
9. 305 s
10. (a) positive; (b) positive; (c) zero; (d) positive; (e) negative; (f) negative; (g) negative; (h) −5 J
13. 11 cm
16. (a) −200 J; (b) −335 J; (c) −135 J
27. −1.7 C
40. −10.0 J
43. (a) 40 J/s; (b) 0.12 g/s
45. (a) 27 C = 80 F; (b) −22 C = −7.3 F
51. 25 m2
55. 325 C
56. (a) 23.5 kcal (98.45 kJ); (b) 1.1 kcal (4.63 kJ); (c) 990 C
Kap. 19
Questions:
3. 20 J
4. (a) 0; (b) 0; (c) negative; (d) positive
5. (a) 3; (b) 1; (c) 4; (d) 2; (e) yes
6. (a) 0; (b) 0; (c) negative; (d) positive
10. (a) same; (b) increases; (c) decreases; (d) increases
Problems:
4. (a) 17.4 J; (b) 37.0 J/mol K; (c) 28.7 J/mol K
23. (a) 7.48 kJ; (b) 7.48 kJ; (c) 0; (d) 0; (e) −3.61 kJ; (f) 3.61 kJ; (g) −6.44 kJ; (h) −3.86 kJ;
(i) −2.58 kJ; (j) 1.04 kJ; (k) 0; (l) 1.03 kJ; (m) 0.0492 m3; (n) 2.00 atm; (o) 0.0746 m3;
(p) 1.00 atm
24. (a) 0.312 mol; (b) 909 J; (c) 0.714
31. 196 kPa
38. (a) 2.46 atm; (b) 351 K; (c) 0.389 L
40. 0.25
45. 1.8 × 10-13 Pa
49. 11.2 kJ
50. 6.8 kJ
52. (a) 7.61 mmol; (b) 4.58 × 1021 atoms
53. (a) 1.64 × 1010 molecules/cm3; (b) 344 m
60. 9.2 GHz
Kap. 20
Questions:
1. b, a, c, d
2. 9 and −8, 8 and −5, 5 and −3, 3 and −2
3. unchanged
4. (a) AE; (b) AC; (c) AF; (d) none
5. a and c tie, then b and d tie
7. (a) same; (b) increase; (c) decrease
8. c, a, b
10. (a) same; (b) increase; (c) decrease
Problems:
1. 39 C
2. (a) 1.84 kPa; (b) 442 K; (c) 3.16 kJ; (d) 1.94 J/K
4. 1.17 MJ
6. 10.7 J
10. 99.999 954 %
12. (a) 4.5 kJ; (b) −6.2 kJ; (c) 11 kJ
14. (a) 32.1 kJ; (b) 4.1 kJ
17. (a) 280 K; (b) 0; (c) +1.91 J/K
18. (a) monatomic; (b) 75%
23. 39.7 J/K
24. (a) 3.00; (b) 6.00; (c) 0; (d) 21.6 J/K; (e) 0
25. (a) 734 J; (b) -276 J; (c) 458 J; (d) 62.4%
29. 487 W
36. 20.8 kJ
37. (a) 3.00: (b) 1.98; (c) 0.660; (d) 0.495; (e) 0.165; (f) 34.0%
38. (a) 42%; (b) 22 kJ
39. (a) 70.6 C; (b) −29.5 J/K; (c) +33.4 J/K; (d) +3.82 J/K
43. (a) 22.9 kJ (b) 7.1 kJ
45. (a) -4.61 kJ; (b) -11.5 J/K; (c) 0
46. (a) 18.3 J/K; (b) 30.2 J/K
47. +1.6 J/K
Kap. 33
Questions:
1. (a) positive direction of z; (b) x
3. (a) same; (b) increase; (c) decrease
9. B
11. none
12. d, b, a, c
Problems:
1. 32 or 58
3. (a) 8.5%; (b) 40 counterclock (for an observer looking in the negative z axis direction)
16. (a) 0.20; (b) 0.80
21. 1.92
22. (a) 58.3; (b) larger
27. (a) 57 nT; (b) 0.38 W/m2; (c) 3.5 kW
33. 2.74 m
39. 37.2
42. (a) 1.4 × 10−22 W; (b) 1.8 × 1014 W
60. (a) greater; (b) greater; (c) 1.54; (d) 2.07
62. 1.0
Kap. 35
Questions:
1. (a) decrease; (b) decrease; (c) decrease; (d) blue
2. (a) increase; (b) 1λ
4. a, c, b
8. (a) 300 nm; (b) exactly out of phase
10. (a) 0.5 wavelength; (b) 1 wavelength
12. (a) no; (b) 0; (c) 2L
Problems:
11. 161 nm
31. 151
39. 1.85 mm
45. 62.5 nm
55. 1.00030
47. (a) 456 nm
61. (a) 858 nm; (b) 2.58 μm
69. 420 nm
74. (a) 0.010 rad; (b) 9.0 mm
79. (a)7.88 μm; (b) 2.02 μm
Kap. 36
Questions:
2. 4
6. (a) contract; (b) contract
7. (a) larger; (b) red
9. (a) decrease; (b) same; (c) in place
10. (a) decrease; (b) decrease; (c) to the right
12. (a) less; (b) greater; (c) greater
Problems:
3. 1.82 × 103
4. (a) 3; (b) 0.061
6. (a) 5; (b) every fifth bright fringe is missing; (c) d/a = 5/m, m = 2, 3, 4, …
11. 4
17. (a) 7.1 μm; (b) 28 μm
35. 50 m
57. 0.26 nm
64. (a) 56 m; (b) no; (c) artificial light on the night side of Earth would be a sure sign
72. (a) 0.52; (b) 98 μm
73. (a) 0.36 (6.3×10-3 rad); (b) 2.35 rad; (c) 0.091