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).
The speed of sound is the rate of travel of a sound wave through an elastic medium. In dry air at 20 Â°C (68 Â°F), the speed of sound is 343 meters per second (1,125 ft/s). Thâ¦is equates to 1,236 kilometers per hour (768 mph), or about one kilometer in three seconds and about one mile in five seconds.