Practice_Exam1 - ECH 3023 Practice Exam 1 Fall 2006 Open...

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ECH 3023 Practice Exam 1 Fall 2006 Open book, one page of notes.  Show all work.  Box all answers.   1. (20 pts.)   The  Marangoni  number is a dimensionless group defined as: μα β T L Ma = 3 where  is a length,  μ  is the  viscosity  (mass/length-time) of a fluid,  ∆Τ is a temperature difference, and  α is the  thermal diffusivity  (length 2 /time).  What is the dimension of  ? Justify your answer. 2. (20 pts) Calculate the mass fractions of each species in an equimolar stream of N 2 , CO 2 , and O 2 . 1
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ECH 3023 Practice Exam 1 Fall 2006 3. (30 pts.)     Above are two manometers connected to same vessel but with two different manometers fluids (A and B).  Assume both manometer fluids are much denser than the fluid in the vessel.   For questions (a) and (b)  below, answer either “A”, “B”, or “not enough info”.  Justify your answers. a. (8) If both manometers are open-ended, which fluid is more dense?
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This note was uploaded on 06/18/2008 for the course ECH 3023 taught by Professor Dickinson during the Fall '06 term at University of Florida.

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Practice_Exam1 - ECH 3023 Practice Exam 1 Fall 2006 Open...

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