Results of Quiz 1

Results of Quiz 1 - Results of Quiz 1: The first three...

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Results of Quiz 1: The first three questions were designed to stress the interrelated nature of thermodynamics and transport phenomena. Breaking the situation down into parts or analyzing it in steps allows us to bring he various tools of thermo, transport, and fluid dynamics to bear. Question 4 is on here because I will tend to stick to a single set of units (SI) whenever possible. But, this is only to avoid using the time necessary to gain familiarity with conversions. (It is a useful thing to do.) There are useful aspects to most all unit systems. (But, to talk about that would, again, take time and take us into history.) Questions 5 & 6 represent to familiar situations. In both cases there is no transport into or out of the system – both a well regarded as closed. The can of pop gets warm fast relative to the typical time it is sitting around before being opened (so coolers are used) so it has energy crossing the boundary. On the other hand, during the time it takes to get to work the coffee in a typical thermos does not change temperature significantly. So it can be regarded as effectively thermally isolated. (Note, that even though both are closed. The term “best” in the question means the answer for #6 should be “isolated” because that answer carries more information.) The role of the heart is to circulate blood, act as a pump, implying that questions 7 & 8 refer to fluid flow. In 7, blood moves into and out of the volume so it should be analyzed
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Results of Quiz 1 - Results of Quiz 1: The first three...

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