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PHYS 1002: General Physics II
Answers to even numbered problems
Homework 1
12.4: 5500 N (= 1240 lbs.!). There is an equal and opposite force acting from below.
12.22: 27.9 L, or 0.0279 m3
Homework 2
13.42: 281 J/K
Homework 3
14.12: For both (a) and (b), x=x0 cos(π t - φ), where x0= 5 cm and t is measured in seconds. (a) φ=±π/2 (b) φ=0
14.20: 0.16 m
14.26: 4.78 N/m
14.44: 9.783 m/s2
Exam 1 suggested problems
12.18: 0.0397 mol
15.2: (a) 0 (b) 3.0 cm
15.4: (a) 3.08 m (b) 536 m (c) 25.2 m
15.14: shortest is 2.0 cm, longest is 680 cm
15.18: 348.3 m/s
15.34: (a) 2200 Hz (b) 2200 Hz - 1800 Hz = 400 Hz
Homework 4
16.38: E=20.5 N/C, 34.5° north of east
Homework 5
17.2: 50 MV
17.20: 19.8 kV
17.30: 20 μF
Homework 6
18.2: 3.09 A
18.8: 364 ohms
18.36: (a) 0.045 A each (b) zero in left, 0.090 A in right
18.38: 5.3 ohms
18.62: 30 sixty watt bulbs
Exam 2 suggested problems
19.6: horizontally to your left
19.16: 0.20 N
19.22: 0.662 T
19.40: 3.33 cm
Homework 6
22.10: 29 cm
22.18: -4.2×
Homework 7
22.10: 29 cm
22.18: 62.7°
Homework 8
29.2: 78.4%
29.12: (a) 39K: 19 protons, 20 neutrons; 39Ca: 20 protons, 19 neutrons.
(b) 23Na: 11 protons, 12 neutrons; 23Mg: 12 protons, 11 neutrons.
29.24: 58.166 MeV
29.34: (a) 222Rn (b) 233U (c) 59Fe
29.64: 12.86 MeV
Homework 9
25.6: 0.93c
25.16: 4 minutes, 59 seconds
Final Exam suggested problems
22.2: 84 cm
22.26: 44 cm, magnification -4.1 (see also 22.35)
22.54: 24.44°
25.44: 0.81 m0c
29.16: 7.4×10-15m
 PHYS 1002
Kelsey Jordahl
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