cee111-fa10-mt1-Nazaroff-exam

cee111-fa10-mt1-Nazaroff-exam - CE 111 E nvironmental E...

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CE 111: Environmental Engineering \tITDTERM EXAM #2 3 November 2010 1. Concepts in environmental transport (4 points; 1 each) Provide a brief answer to each of the following questions to demonstrate your knowledge and understanding of environmental transport phenomena. (a) Write an expression for the relationship bet w een one-dimensional advective flux and species concentration. Define your terms and pr ovide appropriate units for each. (b) Turbulent transport is often modeled in a way that parallels Fick's law: J t = -8 de. Y dy Define the symbol 8 and provide an appropriate set of units. (c) Drag on a particle is governed by two fluid properties: density and viscosity. What is the dimensionless number that determines which of these properties contributes strongly to drag? (d) In studying projectile motion , one commonly starts with Newton's-law : F= m Q. In environmental transport , the basis for analyzing particle settling is to solve F = o.
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