LIST OF SYMBOLS Symbol and meaning U.S. units SI unitst а Constantin Наll-Yarborough equationofstate а Constant in specific-heatequation Btu/(lb ·mol·oR) J*I(kg'mol'К) m а Constant in gas viscosity equation as Acceleration along а stream tube ftlS2 m/s2 А Area ft2 m2 Аа Annulararea between float and ft2 m2 tapered wall ofа variable-area flowmeter Ар Deadweight-testerpiston area in2 mm2 А, Throatarea ofа critical nozzle ft2 m2 Aj1 Effective area offloat in а f1' m2 variable-areaflowmeter Ар Pipe area f1' m2 Асс Ассшасу.combined precision and % % bias errors (Асс),.f Reference-conditionaccuracy % % Ap1'te Plate area in viscosity derivation f1' m2 equation А Constant in Redlich-Kwong equationofstate А Constant in Ostwald power-law equation A Constantin liquid viscosity L equation Ь Constantin Наll-Yarborough equation ofstate Ь Constantin equation for specific heatat constant pressure Ь Constantin general form of discharge-coefficientequation ЬС Slope constant in liquid-bulk modulus equation Ьр Frequency coefficientfor pulsating flow tExceptfordimensionlessordefinedSI unitsymbols. as in Тк• symbolsthat apply (о SI units areshown inthe(ех! with аsuperscriptasterisk.as inF,';.