Those materials have a specific gravity more than 1. Pure water at 4 C (the maximum density) was chosen as the accepted standard for specific gravity and given the value of 1. Some other standards set pure water at 60 F as sg = 1 so it is more correct to state the base used.
Riverside County Income and Careers. As of 2010-2014, the per capita income of Riverside County is $23,660, which is lower than the state average of $29,906 and is lower than the national average of $28,555. Riverside County median household income is $56,592, which has grown by 31.96% since 2000. The median household income growth rate is higher than the state average rate of 29.47% and is higher than the national average rate of 27.36%.
Map of County. Riverside county, California, has an estimated population of 2,267,760, of which 77.5% are thought to have some form of healthcare insurance (ref. 2007 US Census Bureau). 46 licensed general acute care hospitals have at least part of their core market in this county.