# 2007_Prelim_2_answers - BEE 260 2nd Mid-term Exam(100...

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BEE 260 2 nd  Mid-term Exam (100 points) October 18 th , 2007 NAME: _____________________________________________________ Please put your name only on the first page. THIS EXAM IS CLOSED BOOK!!! YOU MAY USE A CALCULATOR Be aware that we might give you more information in the problem sets than you need in order to  solve the problem correctly.  Show all work on the exam sheet, use the reverse side if necessary. Clearly state any  assumptions made. If you cannot solve one part of a multipart question, clearly state the  value you assume and continue. You will have until 11:25 to complete the exam.  DO NOT WORK ON THIS SHEET All questions are not weighted equally: Problem 1 (10 points) Problem 2 (10 points) Problem 3 (10 points) Problem 4 (25 points)

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Problem 5 (15 points) Problem 5 (25 points) Bonus questions at the end are worth 2 points each Equations for BEE 260’s 2     nd     Exam     ( 29 2 2 2 1 2 2 ; ; 2 cos 4 2 L t F hL k m L x n e L x T T T T T T hA q Q x T k t T c dx dT k A q o t L S i S P α π δ ρ = = = = - - - = + = - = - - - T T T T Y i ; 2 1 ; x t X
1)  Match the property on the left with the units on the right (2 points each). _b __Thermal diffusivity a.   _c __Heat flow b.    _a __Thermal conductivity c.    W _e __Heat flux d.    _d __Specific heat e.    2)  What is the D-value and Z-value of the organism whose death curve is below (2.5  points  each)? Remember to include units! a) D-value__20 ____ b) Z-vaule__15 ____

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3)   Define the following (2 points each): a) Biomolecule: Any biological molecule such and an antibody, DNA probe, peptide or  enzyme. b)

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2007_Prelim_2_answers - BEE 260 2nd Mid-term Exam(100...

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