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.
Arbor Day Foundation Names Fort Pierce Tree City USA for 28th Consecutive Year! The City of Fort Pierce was named a 2016 Tree City USA by the Arbor Day Foundation in honor of its commitment to effective urban forest management. The City of Fort Pierce has received this prestigious designation for 28 consecutive years.