A specific gravity scale developed by the American Petroleum Institute for measuring the relative density of various petroleum liquids, expressed in degrees. API gravity is gradated in degrees on a hydrometer instrument and was designed so that most values would fall between 10Â° and 70Â° API gravity. The arbitrary formula used to obtain this effect is: API gravity = (141.5/SG at 60Â°F) - 131.5, where SG is the specific gravity of the fluid.
The name Courtney is a French baby name. In French the meaning of the name Courtney is: From the court, or short nose. From the surname of the aristocratic Courtenay family, based on the Old French word meaning short nose.Anglo-Saxon Meaning: The name Courtney is an Anglo-Saxon baby name.n French the meaning of the name Courtney is: From the court, or short nose. From the surname of the aristocratic Courtenay family, based on the Old French word meaning short nose.
The name Tracy is an English baby name. In English the meaning of the name Tracy is: From Thracia. Surname dating from before the Norman conquest. French Meaning: The name Tracy is a French baby name.In French the meaning of the name Tracy is: From Thracia. Surname dating from before the Norman conquest.he name Tracy is a Latin baby name. In Latin the meaning of the name Tracy is: Bold. Greek Meaning: The name Tracy is a Greek baby name. In Greek the meaning of the name Tracy is: Harvester.