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).
More commonly the term refers to the speed of sound in air. The speed varies depending on atmospheric conditions; the most important factor is the temperature. Here we have used standard sea level and a temperature of 15 C / 59 F, so the speed of sound (in air) is aprox: 340m/s, 1225 km/h, 761 mph, 661 knots. more info.