Using this difference, one can estimate how far away the bolt of lightning is by timing the interval between seeing the flash and hearing thunder. The speed of sound in dry air is approximately 343 m/s or 1,127 ft/s or 768 mph (1,236 km/h) at 20 Â°C (68 Â°F).
From Wikipedia, the free encyclopedia. Fort Pierce is a city in and the county seat of St. Lucie County, Florida, United States. It is also known as the Sunrise City, sister to San Francisco, California, the Sunset City. The population was 41,590 at the 2010 census. As of 2012, the population recorded by the U.S. Census Bureau was 42,645.
Fort Pierce was awarded the 2005 City of Excellence Award by the Florida League of Cities for overall excellence in city government and in 2011, Main Street Fort Pierce, Inc. received the Great American Main Street Award from the National Trust for Historic Preservation in downtown.he project is on a 2 year renourishment cycle due to impacts to the beach from the federal navigation project at Fort Pierce Inlet. This 2 year renourishment cycle is a much shorter renourishment interval than what is typical for other projects along the east coast of Florida.