A periodontist is a dentist who specializes in the prevention, diagnosis, and treatment of periodontal disease, and in the placement of dental implants. Periodontists are also experts in the treatment of oral inflammation.
Ground speed. Ground speed is the horizontal speed of an aircraft relative to the ground. An aircraft heading vertically would have a ground speed of zero. Information displayed to passengers through the entertainment system often gives the aircraft ground speed rather than airspeed.
Dodge Says 2015 Charger SRT Hellcat is the World's Fastest Production Sedan [142 Pics] If being super-fast on a straight-line counts, then Dodge has hit the jackpot with its new 2015 Charger SRT Hellcat that completes the 0-60mph (96km/h) in 3.7 seconds, the 1/4 mile in 11 seconds and tops out at 204mph (328km/h).