Note: These answers are given to help you determine if you have worked a problem correctly. A full solution is still required to get full credit for the problem.

Ch. 18 P 4: 1.5 q on C; P 14: 6.1 x 10^-10 C; P 24: 0.37 N; P 42: 3.0 x 10⁵ m/s; P 68: k = 92.0 N/m.
Ch 19 P 32: 1.3x 10⁷ V/m.
Ch 20 P 10: 0.58 ; P 20: T = 140 deg. C; P 48: (a) 28.9 V, (b) 16.7 W; P 58: 5.24 , 0.76 ; P 82: 1,71 A, bottom to top; P 112: 3.4 x 10⁴s.
Ch 21 P 72: 8.71 x 10^-3 m; P 80: 9.1 x 10^-8 T .
Ch. 22 P 10: (a) 0.14 kg, (b) -1.5 J, (c) 1.5 J; P 48: 1.4 V
Ch 23 P 14: 0.0596 A; P 36: f = 521 Hz; P 50: 270 Hz
Ch 24 P 14: 1.5 x 10¹⁰ Hz; P 22: 2.6 x 10⁶ m; P 36: (a) 0°, (b) 45°
Ch 25 P 40: (a) 1/4 R; (b) 3/4 R .
Ch 26 P 28: 5.1 m; P 74: -0.20 diopt, -0.15 diopt; P 54: d_i = -75.0 cm, m = +2.50; P 88: 4.09 x 10^-3 rad; P 96: 3.9 x 10^-2 rad
Ch 28 P 8: 16; P 10: v = 2.84 x 10⁸ m/s; P 18: L _0M/L_W - 8.59;
Ch 29 P 36: (a) 1.4 x 10^-35 m; (b) 14 m
Ch 32 P 38: (a) .513 MeV; (b) 2.43 x 10^-12 m; (c) 2.73 x 10^-22 kg m/s; P 40: 815 MeV