In Virginia: Anthem Health Plans of Virginia, Inc. trades as Anthem Blue Cross and Blue Shield in Virginia, and its service area is all of Virginia except for the City of Fairfax, the Town of Vienna, and the area east of State Route 123.
For example, at sea level in a standard atmosphere, at a temperaturâ¦e of 59-degrees Fahrenheit (15 Celsius), sound travels 761 miles per hour (1,225 km/p/h). At a temperature of 32-degrees Fahrenheit (0 Celsius) the speed of sound drops to 742 mph (1,194 km/p/h).
Simply put, the denser the material the faster the sound waves travel. The speed of sound through air at ground level is approximately 760 mph, or approximately 1100 feet per second. The old lightning/thunder trick offers a good example. For approximately every five seconds the sound travels is one mile.