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Warming up on...   Heat Engines and Refrigerators

This assignment is due before 9 AM, Wednesday, December 5th, 2007.

Please type your last name and first initial (e.g., Rader, A):

Please type a nickname: (in case your answer gets used in class).



The following questions refer to the material you were to read in preparation to the lesson. Please write a three or four sentence response to each of the questions.

You may change your mind as often as you wish. When you are satisfied with your responses, click the SUBMIT HOMEWORK button at the bottom of this page.

WarmUp questions are worth 4 points each towards your "WarmUps" score (100 points total).


Don't forget, evaluations of Dr. Rader will be done in class on Wednesday, 12/05/07. Don't miss this opportunity to give Dr. Rader a grade!



1.


In your book, an illustration like this one is used to represent a heat engine. If this is to represent your car, what parts of your car correspond to the various parts of the diagram?


2.


On a hot day in Indianapolis, it is 97 °F outside and 70 °F inside. Estimate the electrical power needed by an air conditioner that moves 5000 BTU/hr under these conditions.





3.


Efficiency is defined as e=W/QH. Does this make sense as a definition? How so?



Below is a space for your thoughts, including general comments about today's assignment. What was hard or confusing (or cool)? What would you like to spend extra time on in class? Do you see how this subject fits in with the others we have discussed?




You may change your mind as often as you wish. When you are satisfied with your responses click the SUBMIT button.



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