Conceptual Physics

(Sean Pound) #1

Chapter Assumptions


Elementary charge, e = 1.60×10–19 C


Mass of electron, me = 9.11×10–31 kg


Mass of proton, mp = 1.67×10–27 kg


Unless stated otherwise, use 5.00×10–5 T for the strength of the Earth's magnetic field at its surface.

Answers to selected problems


Chapter 28 Answers


C.1 Down
Answers vary
C.2 (a) The field is perpendicular to the plane of the wires.
(b) Reinforce
(c) Cancel
Answers vary
C.5 (a) No
(b) Electron
C.6 No
Answers vary
C.9 No
Answers vary
C.12(a) Toward you
(b) Left
(c) Down
(d) Down
C.14(a) Negative
(b) Positive
(c) Answers vary
C.16Away from you
Up

0.1 (a) Curve
(b) No
(c) Yes
7.1 (a) 6.08eí16 N
(b) Positive y direction
7.3 (a) 805 m/s
(b) East
7.5 1.78 C
7.7 17.3°

9.1 (a) 2
(b) 180q
(c) 90.0°
10.10.417 T
10.30.631 T
10.55.76eí3 T

11.12.90 T
12.13.00e+4 m/s
12.32.21eí22 J
12.5(a) 1.0e4 m/s
(b) 1.8eí2 m/s

13.12.75eí3 m
13.356.3 m/s
13.53.67e+2 s
13.72.28eí12 T

15.1(a) 1.29eí2 T
(b) Decrease
15.3(a) 4.65eí3 m
(b) 5.65eí3 m
(c) 2.00eí3 m
15.50.0286 m
16.1(a) 8.29 m/s
(b) 1.07 m
(c) 0.872 m/s
(d) 0.708 m

17.1(a) A circle
(b) A straight line
18.114.1 N
18.32.27 A
18.535.2°
20.1(a)
(d)
22.1 2.00eí5 T
22.3 1.14eí3 T
22.5 896 A
22.7 (a) 1.64eí26 N
(b) 55.4 m
22.9 4.58eí23 N, in the same direction as the current
22.11(a) Opposite directions
(b) 75.0 A
22.138.80eí3 m
22.146.67 m
22.15Direction: +z
Strength: 3.66eí7 T

(^748) Copyright 2000-2007 Kinetic Books Co. Chapter 28 Answers

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