Silver Has a Fermi Level (Energy)of 5

question 27

Multiple Choice

Silver has a Fermi level (energy) of 5.5 eV.At 0 K,at what speed would the electrons be moving if they had kinetic energy equal to the Fermi energy? (This speed is known as the Fermi speed.) (m_el = 9.11 × 10^-31 kg,1 eV = 1.60 × 10^-19 J,h = 6.626 × 10^-34 J • s)

• A) 1400 km/s
• B) 1.0 km/s
• C) 2.2 km/s
• D) 1100 km/s
• E) 3.5 km/s

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