Ch. 15
1. 1.1E-8 N
4. F = 1.91(k q2 / a2) diagonal toward the negative charge
6. 2.25E-9 N
10. 46.7 N left, 157 N right, 111 N left
18. 2.00E7 N/C right, 40.0 N left
21. 1.2E4 N/C
24. 1.88E3N/C at 4.40° below +x axis
33. a. zero b. –5 µC outside, +5 µC inside c. zero inside, –5 µC outside d. –5 µC outside, zero inside
34. a. E = 0 inside; field is as if all charge is concentrated at the center b. 1.8E6 N/C c. 1.1E5 N/C
35. 1.3E-3 C
Ch. 22
6. a. 1.94 m b. 50°, or parallel to incoming ray
12. a. 327 nm b. 287 nm
15. n = 1.23 a. 1.56E8 m/s b. 329.1 nm c. 4.74E14 Hz
17. reflects 6 times from left mirror, 5 times from right mirror
37. 40.8°, 60.6°
13. θ2 = 29.4°, φ = 40.0°, 111°
16. 53.4°
18. 30.0°, 19.5°, 30.0° therefore light emerges parallel to incident beam
19. 0.388 cm
20. 1.06 E -10 s
Ch. 23
29. a. M = -1.00, real, inverted, 40.0 cm beyond lens
b. q → ∞, no image formed because rays are parallel
c. M = +2.00, virtual, upright, 20.0 cm in front of lens
31. a. +1/3, virtual, upright, 13.3 cm in front of lens
b. +1/2, virtual, upright, 10.0 cm in front of lens
c. +2/3, virtual, upright, 6.67 cm in front of lens
34. M = +2, q = -2 p, f = 5.68 cm
Ch. 24
15. 91.9 nm
16. 193 nm
17. 550 nm
19. 0.500 cm
30. a. 2.3 mm b. 4.5 mm
36. a. 2 complete orders b. 10.9°
40. 7.35°
14. a. 123.4 nm b. 81.58 nm
18. 233 nm
20. 290 nm
26. 99.6 nm
Ch. 14
16. a. 0.0796 W/m2 b. 109 dB c. 2.82 m
18. a. 2 b. 5
43. v = 353 m/s (see p. 461), f = 58 Hz
44. a. 531 Hz b. 4.25 cm
45. 3.0 kHz
