Use Table 24.1 to determine the conductivity of (a) Copper (b) Seawater. Table 24.1 Resistivities Material Resistivity

Use Table 24.1 to determine the conductivity of
(a) Copper  
(b) Seawater.

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Table 24.1 Resistivities Material Resistivity (. m) Metallic conductors (20°C) Aluminum 2.65 X 10-8 Соpper 1.68 X 10-8 Gold 2.24 X 10-8 Iron 9.71X 10-8 Mercury 9.84X 10-7 Silver 1.59X 10-8 Ionic solutions (in water, 18°C) 1-molar CuSO, 3.9X 104 1-molar HCI 1.7X 10-2 1-molar NaCl 1.4× 10-4 H,O 2.6 X 105 Blood, human 0.70 Seawater (typical) 0.22 Semiconductors Germanium 0.5 Silicon 3X 103 Insulators Ceramics 101-1014 Glass 1010– 1014 Polystyrene 1015– 1017 Rubber 1013–1016 Wood (dry) 108– 1014