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UNIVERSITY OF CALIFORNIA, BERKELEY Physics Department 7b, Liphardt Spring Term 2006 Exam #1 Name __________________________ Disc. Section ____________________ SID ____________________________ #0 (20)______ #1 (25)______ #2 (25)______ #3 (25)______ #4 (25)______ Total _______ of 120 The relative weight of each problem is indicated next to the problem number. Most credit will be given for algebraic work. Do not insert numerical values until you have a final algebraic answer inside a box. If you don’t know a particular constant, use a symbol to get partial credit. It is almost impossible to award partial credit if you insert numbers too early. If you get stuck on one problem, go on to the next and come back to the difficulties later in the exam period. Do not leave early until you have completed everything. Do not quit! Never, never, never quit!! As usual, before you start to manipulate equations and numbers you should think for a moment and make sure that you have a general sense of the important features of a problem. Finally, please do not violate the first and second laws! k B = 1.38 x 10 -23 J/K N A = 6 x 10 23 There is no need to compute precise numerical results – ball-park values are ok. Points will be deducted for answers with insane units (e.g. the final temperature is 19 kg*m). Stuck? Approximate, approximate, approximate.
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0. Warm-up Problems (20 points). Fill in the blank, or answer (T)rue or (F)alse. 0 (1). Energy is conserved. ______ 1 (1). Entropy is conserved. ______ 2 (3). The entropy of the universe always ______________, except for a ______________ process, where the entropy change is _________. 3 (4). Which four criteria must be met for a gas to be “ideal?”
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