Warming up on the 2nd Law of Thermodynamics

This assignment is due before 9 AM, Wednesday, September 6th, 2000.

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The following three questions refer to the material you were to read in preparation to the lesson. Questions one and two require you to write a three or four sentence response. Number three is a multiple choice question. Click in the appropriate circle.

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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 parts of the diagram?



2.


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





3.


The coefficient of performance of a Carnot refrigerator is

greater than 1

exactly one

Infinite

exactly zero

between zero and 1

none of the above

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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