prs11_20

prs11_20 - Which of the following renders the isen- tropic...

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Unformatted text preview: Which of the following renders the isen- tropic relations invalid. 1. Flow is unsteady 2. Velocity is very large 3. * Gas is non-perfect 4. Changes between states 1 and 2 are finite (rather than infinitesimal) 5. Not sure Which of the following is NOT an ex- ample of a w or a q process? 1. Bit of fuel inside CV ignites 2. * Gravity acts on descending CV 3. Friction acts along motion of CV 4. Pressure acts on contracting CV 5. Not sure Note: Only static internal energy changes were being considered, not kinetic energy changes Two uid jets of the same density and internal energy e ow as shown. What is the internal energy ow integral for the control volume? V n e dA 1. 2 VA e 2. 2 VA e 3. * 4. not sure A V A V control volume n n Two uid jets of the same density ow as shown. What is the kinetic en- ergy ow integral for the control vol- ume? 1 V n V 2 dA 2 1. V 3 A 2. V 3 A 3. * 4. not sure A V A V control volume n n Air is forced...
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prs11_20 - Which of the following renders the isen- tropic...

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