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Unformatted text preview: PHYS1200 PHYSICS II SPRING 2005 HOMEWORK SOLUTIONS CLASS 25. 41.17, 41.22, 41.46, 41.48; Q41.07, Q41.10 41.17. Since the Fermi energy is known, the number of electrons per volume can be found with the help of equation 419, on page 1150. Then, the number of atoms per volume can be found from the density and molar mass given, as in problem 1). Finally, the number of electrons per volume can be divided by the number of atoms per volume to give the number of electrons per atom. E h m n n h mE n F F 33 , so J s) kg)(11.6 eV)( J eV) 0.121 m = = = × ⋅ × × = × 0121 1 0121 1 6 63 10 911 10 16 10 179 10 2 2 3 3 3 2 34 31 19 3 2 29 . . ( . ( . . / . / / / Then, atoms volume = 2.70 g/cm /mol atoms/mol atoms/cm atoms/m 3 3 3 27.0 g 6 02 10 6 02 10 6 02 10 23 22 28 . . . × = × = × Finally, electrons atom = electrons/m atoms/m 3 3 179 10 6 02 10 29 28 . × × ....
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This note was uploaded on 09/17/2008 for the course PHYS 1200 taught by Professor Stoler during the Spring '06 term at Rensselaer Polytechnic Institute.
 Spring '06
 Stoler
 Energy, Work

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