Radiation. 1  Radiation is the emission of energy as waves or particles or rays. 2  Radiation does not require a medium to transfer energy. 3  Radiant energy is either reflected or absorbed by matter. 4  Energy that is absorbed increases the kinetic energy of the object. 5  This increases the temperature of the object.
The Pennsylvania Turnpike could also be considered one of the first Interstate Highways. On October 1, 1940, 162 miles (261 km) of the highway now designated Iâ70 and Iâ76 opened between Irwin and Carlisle. The Commonwealth of Pennsylvania refers to the turnpike as the Granddaddy of the Pikes.
The Pennsylvania Turnpike between Irwin (southeast of Pittsburgh) and Carlisle (west of Harrisburg) was officially opened in October 1940 and is now designated as I-76 and I-70. View the slideshow above to see the country's 10 longest interstate highways, their length, states served and termini.