a unit of mass used in particle physics. Mass and energy are related by Einstein's famous equation, E = mc 2. The constant c is the speed of light, 299.79 x 10 6 m/sec. An energy of 1 electronvolt is therefore equivalent to a mass of about 1.782 662 x 10-33 gram, or about 1.073 544 x 10-9 atomic mass unit.
Yulee is a census-designated place (CDP) in Nassau County, Florida, United States. The population was 11,491 at the 2010 census.
On average, there are 223 sunny days per year in Yulee, Florida. The July high is around 91 degrees. The January low is 43. Sperling's comfort index for Yulee is a 78 out of 100, where a higher score indicates a more comfortable year-around climate. The US average for the comfort index is 54.