WOLFRAM SYSTEM MODELER
    HelmholtzHelmholtz equation of state  | 
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SystemModel["Modelica.Media.Air.ReferenceAir.Air_Utilities.Basic.Helmholtz"]

| d | 
         Type: Density (kg/m³) Description: Density  | 
    
|---|---|
| T | 
         Type: Temperature (K) Description: Temperature (K)  | 
    
| f | 
         Type: HelmholtzDerivs Description: Dimensionless Helmholtz function and derivatives w.r.t. delta and tau  | 
    
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