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.
Glossary Â» Units Â» Angular Velocity Â» Revolution Per Second. Revolution Per Second (rps, rev/s) is a unit in the category of Angular velocity. It is also known as revolutions per second, revolution/second, rev/second. Revolution Per Second (rps, rev/s) has a dimension of aT-1 where T is time. It can be converted to the corresponding standard SI unit rad/s by multiplying its value by a factor of 6.28318530718.