Chapter 25- College Physics, 7^th ed. (Sears, Zemansky, Young)

25-1. 1.08 x 10⁵ N/C; upward

25-2. 7.23 x 10^-9 C

25-3. 3.35 m

25-4. a) 1.26 x 10²⁰ N/C b) 5.16 x 10¹¹ N/C

25-5. a) 2.50 N/C b) 4.00 x 10^-19; upward

25-6. –1.65 x 10^-5 C

25-7. 5.57 x 10^-11 N/C

25-8. a) 1.62 x 10³ N/C b) 4.27 x 10⁶ m/s

25-9. 3.55 x 10³ N/C

25-10. 0.66 m from q₁

25-11. a) 1050 N/C; -x direction b) 312 N/C; +x direction c) 845 N/C; +x direction

25-12. a) 120 N/C; +x direction b) 25.9 N/C; +x direction

25-13. 35.7 N/C; 245°

25-14. a) 0 b) 2.50 x 10⁴ N/C; +x direction c) 1.77 x 10⁴ N/C; 76.7°

d) 1.59 x 10⁴ N/C; +y direction

25-15. a) 4.49 x 10⁴ N/C; -x direction b) 2.00 x 10⁴ N/C; +x direction c) 8.34 x 10³ N/C; 110°

d) 1.59 x 10⁴ N/C; -x direction

25-16. 1.24 x 10^-11 C

25-17. 2.82 x 10⁵ N*m²/C

25-18. 151 N*m²/C

25-19. 7.97 x 10^-11 C/m²

25-20. 3.13 x 10⁹

25-21. 6.37 x 10^-10 C

25-22. 8.99 cm

25-23. ?

25-24. ?

25-25. a) 0 c) 0 e) –q f) +q

25-26. a) 4.53 x 10⁵ C b) 5.88 C; no

25-27. 55.2°

25-28. a) +5.53 x 10^-10 C b) –3.05 x 10^-9 C

25-29. a) 5.12 cm b) 35.5 cm

25-30. 282 N*m²/C

25-31. –31.2 x 10^-9 C

25-32. a) 1800 N*m²/C b) 0 c) 201 N/C; -x direction

25-33. –2.66 x 10^-10 C

25-34. ?

25-35. see back of book

25-36. ?

25-37. b) q₁ < 0, q₂ < 0 c) 3.12 x 10⁴ N/C

25-38. ?