The energy equation, E + (p/ρ) + (V2/2g) + gZ = constant (E = internal energy/mass), is applicable to___________________?
Correct answer: B. All compressible fluids
- A. Perfect gases only
- B. All compressible fluids
- C. Adiabatic unsteady flow of gases
- D. Isothermal flow of gases
Explanation
The general energy equation includes internal, pressure, kinetic and potential-energy terms, so it is applicable to compressible fluids rather than only to perfect gases or isothermal flow. It can also be used for incompressible fluids as a special case.
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