# Answers to Even Numbered Problems

Chapter 9

P58 - 4.4 x 10-5 m2, 2.7 mm

Chapter 10

P16 - 654 kg/m3

P22 - 4.06 x 103 kg/m3

P36 - 1.1 x 106 s = 13 days

Chapter 11

P4 - 680 N/m, 2.5 cm, 2.5 Hz

P16 - 0.866 xo, 0.500 xo

P34 - 2.8 m/s

P36 - 545 m, 188 m, 3.41 m, 2.78 m

P48 - 1.73

P54 - n x 0.40 Hz where n = 1, 2, 3, ...; (2.5 s)/n where n = 1, 2, 3, ...

Chapter 12

P18 - (a) 9, (b) 9.5 dB

P20 - 4

P60 - 5.8 m/s

Chapter 16

P12 - 83.8 N away from the center of the triangle

P26 - 3.2 x 108 N/C toward the negative charge

P32 - 4.82 x 104 N/C away from the opposite corner

P38 - 8.83 x 106 m/s, mg << qE

Chapter 17

P8 - 3 x 10-5 m

Chapter 18

P10 - 2.5 x 10-3 V

P20 - 3.8 x 10-4 ohms, 1.5 x 10-3 ohms, 6.0 x 10-3 ohms

P36 - 5.3 kW

Chapter 19

P22 - 0.053 ohms, 0.15 ohms

P26 - -26 V

P28 - 0.68 A, 0.,40 A, 1.08 A

P40 - 0.0195 x 10-6 F, 1.4 x 10-9 F

P42 - (C1C2 + C1C3 + C2C3)/(C2 + C3)

P 52 -2.3 x 10-9 F, 14 x 10-6 s

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Last updated on 01/06/00