Conceptual Physics

Answers to selected problems

Chapter 22 Answers

C.1 Richard

Answers vary

C.3 (a) 0 C

(b) 0 C

C.5 (a) Rubber is a(n) insulator.

(b) Iron is a(n) conductor.

(c) Copper is a(n) conductor.

(d) Wood is a(n) insulator.

C.7 the "10 cm" end

C.9 The force does not change.

C.11(a) Yes

(b) Answers vary

0.1 (a) Away from each other

(b) Towards each other

(c) Decreases

1.1 +3.20eí19 C

1.3 1.60eí20 kg

2.1 (a) 0 C

(b) í1.60eí19 C

2.3 3.86e+13 electrons

2.5 1.5e20 electrons

3.1 (a) íe

(b) ʌ

4.1 0 C

6.1 í3.6eí6 C

7.1 (a) Answers vary

(b) +4.00 μC

(c) 40000 dollars

8.1 2.0eí5 C

9.1 (a) Attractive

(b) 8.22eí8 N

9.3 9.32eí7 C

11.1 0.072 N

11.3 3.02e3 N

11.5 (a) NW corner íQ

SW corner +Q

SE corner íQ

(b) NE corner íQ

NW corner íQ

SW corner +Q

SE corner +Q

(c) NE corner +Q

NW corner íQ

SW corner íQ

SE corner +Q

11.7 í167 C

13.1 34 protons

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