Which of the following is NOT one of these assumptions?
The equation:
is frequently applied to a nozzle. Several assumptions are incorporated into the derivation of this equation. Which of the following is NOT one of these assumptions?
A. The system is operating at steady state.
B. The system is adiabatic.
C. The potential energies of the entering and exiting streams are equal to each other.
D. The velocity of the entering stream is negligible.
E. All of the above are necessary assumptions for the derivation of this equation.
A. Incorrect. If the system were not at steady state, time derivatives or differences would appear.
B. Incorrect. If the system were not adiabatic, a heat term (Qor Q ?) would appear.
C. Incorrect. If potential energies were significantly different, this would be a huge nozzle and we would see terms incorporating gravitational acceleration.
D. Incorrect. There is no v_in^2 term present.
E. Correct.
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