Spool of solder. 1.6 mm. Solder (/ËsoÊldÉr/, /ËsÉldÉr/ or in North America /ËsÉdÉr/) is a fusible metal alloy used to create a permanent bond between metal workpieces. The word solder comes from the Middle English word soudur, via Old French solduree and soulder, from the Latin solidare, meaning to make solid.
Columbia, MD Population and Races. As of 2010-2014, the total population of Columbia is 102,116, which is 15.71% more than it was in 2000. The population growth rate is higher than the state average rate of 11.16% and is higher than the national average rate of 11.61%.
By Amanda Briney. Washington, D.C., officially called the District of Columbia, is the capital of the United States (map). It was founded on July 16, 1790 and today has a city population of 599,657 (2009 estimate) and an area of 68 square miles (177 sq km).) Today, Washington, D.C. is still considered separate from its neighboring states (Virginia and Maryland) and it is governed by a mayor and a city council. The U.S. Congress however has the highest authority over the area and it can overturn local laws if necessary.