p42_026 - 26. (a) Combining Eqs. 42-2, 42-3 and 42-4 leads...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
26. (a) Combining Eqs. 42-2, 42-3 and 42-4 leads to the conduction electrons per cubic meter in zinc: n = 2(7 . 133 g / cm 3 ) (65 . 37 g / mol) / (6 . 02 × 10 23 / mol) =1 . 31 × 10 23 cm 3 =1 . 31 × 10 29 m 3 . (b) From Eq. 42-9, E F = 0 . 121 h 2 m e n 2 / 3 = 0 . 121(6 . 63 × 10 34 J · s) 2 (1 . 31 × 10 29 m 3 ) 2 / 3 (9 . 11 × 10 31 kg)(1 . 60 × 10 19 J / eV) =9 . 43 eV . (c) Equating the Fermi energy to 1 2 m e v 2 F , we fnd (using the m e c 2 value in Table 38-3)
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.
Ask a homework question - tutors are online