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.
Port of Fort Pierce Ft. Pierce, FL. St. Lucie County is exploring strategic options for the Port of Fort Pierce. The county owns 20 acres at the port, adjacent to 67 acres owned privately, as well as 12 acres that house the privately owned Indian River Terminal. The second phase report of a new master planning effort was issued in late 2013; the four key recommendations follow.