311_guide9 - ME/NE 311 Introduction to Thermal and Fluid...

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ME 311 Reading Guide #9 1/2 ME/NE 311 Introduction to Thermal and Fluid Sciences Reading Guide #9 Chapter 4 Sections 4.5 – 4.6 Section 4.5: Conservation of Energy for an Open System 1. What are the three things that can cross the system boundary in an open system? _________________________, ________________________, ______________________ 2. The total energy entering the control volume, shown as a blue dashed line in Figure 4.22, consists of internal energy, ________________________, and _________________________. 3. In Equation 4.35, what exactly is V i ? ___________________________________________________________ 4. Flow work due to the inlet fluid stream is denoted by ˙ m i P i v i . True or false 5. Which form of the conservation of energy, i.e., which equation number, “is applicable at an instant in time and deals with rates of energy flow?” ______________________________ 6. If the energy inside a system does not change with time, to what value can the left side of Equation 4.42 be reduced? _______________________ 7. If the energy inside a system does change with time, what type of analysis must be conducted? __________________________________ 8. Does the example problem 4‐10 on page 167 require a transient analysis, or is it steady‐state in nature? _______________________________________________ Section 4.6: The Bernoulli Equation 1.
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