Keep in mind that any voltage, by definition, is a difference in electric potential energy between two points. So while we may say that a voltage source has a voltage of 1.5V, we are actually saying that the voltage between the negative and positive polarities of the voltage source is 1.5V.
Jacksonville, Texas. As of the census[1] of 2000, there were 13,868 people, 4,882 households, and 3,358 families residing in the city. The population density was 981.0 people per square mile (378.7/km2). There were 5,397 housing units at an average density of 381.8 per square mile (147.4/km2).
Duval County, Florida. Duval County is a county located in the U.S. state of Florida. The U.S. Census Bureau 2005 estimate for the county is 826,436. Its county seat is Jacksonville. Duval County was created in 1822. It was named for William Pope Duval, Territorial Governor of Florida from 1822 to 1834.