Midterm1 - PHYSICS 112, Sec. 2 1 st Midterm Exam FALL 2006...

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Unformatted text preview: PHYSICS 112, Sec. 2 1 st Midterm Exam FALL 2006 S. G. Louie Due: 09/26/06 Note : This is a closed book exam. One sheet of notes (both sides) is allowed. Do all 4 problems. Please display your answers clearly (e.g., in a box) and cross out any work that you do not wish to be graded. Note also that the problems are not of the same weight. (20) 1. Answer the following short questions using one or two sentences and appropriate equations if needed. (5) a) What is the fundamental assumption of thermal physics? (5) b) What is the Boltzmann factor? In what context does one use it? (5) c) What is the expression for the thermodynamic identity? Give the physical meaning of each of the terms in the expression. (5) d) Under what conditions can one approximate a collection of identical quantum particles to be a classical ideal gas? (30) 2. Consider a system in thermal equilibrium at temperature . The system has only 3 possible quantum states of energy: - , 0, and , respectively. , respectively....
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Midterm1 - PHYSICS 112, Sec. 2 1 st Midterm Exam FALL 2006...

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