9.) (Based on Neaman, Problem 4.58) - Determine the Fermi energy level with respect to the valence band energy for the following conditions. Assume the material is Gallium Arsenide: (a) T = 300 K, N₁ = 2 × 10¹5 cm-³, N₁ = 0 (b) T = 300 K, Na = 0, N₁ = 10¹6 cm -3 (c) T = 300 K, -3 Na = Na = 101¹5 cm (d) T = 400 K, Na = 0, N₂ = 10¹4 cm-³ (e) T = 500 K, Na = 10¹4 cm¯³, N₁ = 0 -3

Briefly explain the difference between block and random practice, applicable to designing a practice session. Edit View Insert Format Tools Table 12pt v Paragraph v BIUAvev T?v :

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If OR stands for disjunction, AND for conjunction, NOT for negation, and IMPLIES for implication, then match the following names of valid argument forms with their symbolic forms. ✓ Elimination Transitivity ✓ Modus Tollens ✓ Specialization ✓ Modus Ponens A. POR Q NOT (Q) Therefore, P B. P IMPLIES Q Q IMPLIES R Therefore, P IMPLIES R C. P IMPLIES Q NOT (Q) Therefore, NOT (P) D. P AND Q Therefore, P E. P IMPLIES Q P Therefore, Q

SOLVE STEP BY STEP IN DIGITAL FORMAT In how many ways can 300 identical envelopes in packs of 25 be separated into four groups of students so that each group has at least 150 but not more than 100 envelopes?