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examII_w2006

# examII_w2006 - Name MAE 4800 Exam II May 8 2006 Open notes...

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Name:_____________________________________ MAE 4800 Exam II May 8, 2006 Open notes Open book Closed neighbors Open mind Notes: Start exam when instructed – you will be given 120 minutes to complete the exam Write name at top of each page and any additional pages Read each problem carefully – if you still do not understand, ask Read the problem again – note what is being asked Clearly state all assumptions Clearly show all your work, commenting on what you are doing – keep in mind that your exam communicates to those who are grading what you know To maximize points, plug in numbers at the end – solve algebraically first Reference table you are using for properties Good luck! MAE 4800, Winter 2006 5/08/06

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Name:_____________________________________ Problem 1 (50 points) You need to determine the Seebeck coefficient for a particular thermoelectric material. You take an open circuit voltage and temperature difference measurements on a 100 thermocouple, thermoelectric module, as indicated in the figure below. The average of 15 voltage measurements is 2.4V and the average of 15 T measurements is 50K. V oc T Part 1 (25 points) – What is the Seebeck coefficient?
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