College Physics 8th Edition by Serway and Vuille Answers to assigned problems Chapter 15 Problem 5 a) F = 36.9 N b) a = 5.52 × 1027 m/s2 Problem 7 F = 5.07 × 105 N Problem 9 a) F = 2.16 × 10−5 N (attract) b) F = 8.99 × 10−7 N (repel) Problem 13 F = 0.437 N φ = −85.3◦ (Downward and to the right) Problem 15 q = 7.22 × 10−9 C = 7.22 nC Problem 19 E = 7.20 × 105 N/C Problem 23 a) a = 6.13 × 1010 m/s2 b) t = 1.96 × 10−5 s = 19.6 µs c) d = 11.8 m d) KE = 1.2 × 10−15 J Problem 26 x = 0.853 m Problem 32 Ask for diagrams Problem 38 r = 5.15 × 10−7 m = 0.515 µm Problem 42 a) q = 3.38 × 10−9 C b) You only know that the charge is distributed spherically symmetrically within the sphere. Problem 47 a) E = −8 N/C b) E = 0 N/C c) E = 1.44 N/C d) 2 nC on the inside surface and 1 nC on the outside surface of the sphere Problem 52 q = 5.25 × 10−6 C Problem 63 a) E = 1000 N/C b) t = 3.37 × 10−8 s c) Will accelerate in the opposite direction at 1.76 × 1014 m/s2