1. The number of atoms per unit volume is given by n = d/M , where d is the mass density of copper and

M is the mass of a single copper atom. Since each atom contributes one conduction electron, n is also
the number of conduction electrons per unit volume. Since the molar mass of copper is A = 63.54 g/mol,
M = A/N

A

= ( 63.54 g/mol)/(6.022

× 10

23

mol

−1

) = 1.055

× 10

−22

g. Thus,

n =

8.96 g/cm

3

1.055

× 10

−22

g

= 8.49

× 10

22

cm

−3

= 8.49

× 10

28

m

−3

.

Document Outline

• Main Menu
• Chapter 1 Measurement
• Chapter 2 Motion Along a Straight Line
• Chapter 3 Vectors
• Chapter 4 Motion in Two and Three Dimensions
• Chapter 5 Force and Motion I
• Chapter 6 Force and Motion II
• Chapter 7 Kinetic Energy and Work
• Chapter 8 Potential Energy and Conservation of Energy
• Chapter 9 Systems of Particles
• Chapter 10 Collisions
• Chapter 11 Rotation
• Chapter 12 Rolling, Torque, and Angular Momentum
• Chapter 13 Equilibrium and Elasticity
• Chapter 14 Gravitation
• Chapter 15 Fluids
• Chapter 16 Oscillations
• Chapter 17 Waves—I
• Chapter 18 Waves—II
• Chapter 19 Temperature, Heat, and the First Law of Thermodynamics
• Chapter 20 The Kinetic Theory of Gases
• Chapter 21 Entropy and the Second Law of Thermodynamics
• Chapter 22 Electric Charge
• Chapter 23 Electric Fields
• Chapter 24 Gauss’ Law
• Chapter 25 Electric Potential
• Chapter 26 Capacitance
• Chapter 27 Current and Resistance
• Chapter 28 Circuits
• Chapter 29 Magnetic Fields
• Chapter 30 Magnetic Fields Due to Currents
• Chapter 31 Induction and Inductance
• Chapter 32 Magnetism of Matter: Maxwell’s Equation
• Chapter 33 Electromagnetic Oscillations and Alternating Current
• Chapter 34 Electromagnetic Waves
• Chapter 35 Images
• Chapter 36 Interference
• Chapter 37 Diffraction
• Chapter 38 Special Theory of Relativity
• Chapter 39 Photons and Matter Waves
• Chapter 40 More About Matter Waves
• Chapter 41 All About Atoms
• Chapter 42 Conduction of Electricity in Solids
  • 42.1 - 42.10
    • 42.1
    • 42.2
    • 42.3
    • 42.4
    • 42.5
    • 42.6
    • 42.7
    • 42.8
    • 42.9
    • 42.10
  • 42.11 - 42.20
    • 42.11
    • 42.12
    • 42.13
    • 42.14
    • 42.15
    • 42.16
    • 42.17
    • 42.18
    • 42.19
    • 42.20
  • 42.21 - 42.30
    • 42.21
    • 42.22
    • 42.23
    • 42.24
    • 42.25
    • 42.26
    • 42.27
    • 42.28
    • 42.29
    • 42.30
  • 42.31 - 42.40
    • 42.31
    • 42.32
    • 42.33
    • 42.34
    • 42.35
    • 42.36
    • 42.37
    • 42.38
    • 42.39
    • 42.40
  • 42.41 - 42.49
    • 42.41
    • 42.42
    • 42.43
    • 42.44
    • 42.45
    • 42.46
    • 42.47
    • 42.48
    • 42.49
• Chapter 43 Nuclear Physics
• Chapter 44 Energy from the Nucleus
• Chapter 45 Quarks, Leptons, and the Big Bang