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Click on each question to check your answer.
1. What’s the difference between a component that is closed and a component that is in steady state?
A component is closed with respect to a certain quantity if no flow of this quantity enters or leaves the component, and a component is in steady state when its properties do not change with time. (p. 223)
2. What is the benefit and cost of making assumptions?
By making assumptions, we choose to ignore certain aspects of reality, thereby gaining the benefit of simplifying our model. The cost of this simplification is the loss of accuracy. (p. 220)
3. What is the benefit of physical models compared to full-scale prototypes?
Physical models are cheaper and easier to make, and it can be easier to study their behaviours in a wide range of conditions. (p. 218)