According to the U.S. Census Bureau, the county has a total area of 685 square miles (1,770 km2), of which 681 square miles (1,760 km2) is land and 3.8 square miles (9.8 km2) (0.6%) is water. It is the fourth-largest county in Tennessee by area. The county is located atop the Cumberland Plateau.
Revenue passenger kilometres (RPK) is a measure of the volume of passengers carried by an airline. A revenue passenger-kilometre is flown when a revenue passenger is carried one kilometre. A passenger for whose transportation an air carrier receives commercial remuneration is called a revenue passenger.
An elevated CPK result, or one that goes up from the first test to the second one or later samples, usually indicates there has been some recent muscle damage.... Creatine phosphokinase or, 'CPK,' is an enzyme found in high concentrations in a person's muscles where it facilitates a person's muscle contraction.PK is also referred to as, 'creatine kinase,' or, 'CK.' A doctor might check a person's CPK when they are concerned a person has experienced muscle damage or breakdown. In a rare condition called, 'rhabdomyolysis,' extreme muscle breakdown floods a person's blood with CPK and additional chemicals in their muscle cells.