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).
For example, the speed of sound in gases depends on temperature. In 20 Â°C (68 Â°F) air at sea level, the speed of sound is approximately 343 m/s (1,230 km/h; 767 mph) using the formula v = (331 + 0.6 T) m/s. In fresh water, also at 20 Â°C, the speed of sound is approximately 1,482 m/s (5,335 km/h; 3,315 mph).