The term specific gravity, symbolized sp gr, refers to the ratio of the density of a solid or liquid to the density of water at 4 degrees Celsius. The term can also refer to the ratio of the density of a gas to the density of dry air at standard temperature and pressure, although this specification is less often used.
Households in Columbia, MD have a median annual income of $100,849, which is more than the median annual income in the United States. Look at the chart to see how the median household income in Columbia, MD compares to that in it's parent locations. Dataset: Source:
The ACS 1-year survey shows that the median family income for North Carolina was $57,380 in 2014. Compared to the median US family income, North Carolina median family income is $8,530 lower. Like the median household income numbers, 2015 family income data will be released in September of 2016.