Arcata is also the location of the Arcata Field Office of the Federal Bureau of Land Management, which is responsible for the administration of natural resources, lands and mineral programs, including the Headwaters Forest, on approximately 200,000 acres of public land in Northwestern California.
Compton's, 1995. They divide the mass of the Earth by the volume, which gives the average density of the material in the earth as 3.2 ounces per cubic inch (5.5 g/cm 3).. 5.5 g/cm 3. Orbits Voyage Through The Solar System. Phoenix, AZ: Software Marketing, 1989. Mean Density: (water = 1) 5.52.. 5.52 g/cm 3. Morse, Joseph Laffan.
World population density The world population density is 55.7 people per square kilometer (144.2 per mi 2) as of February 2018. This number is calculated using 7,576,951,385 people as the world population and 136,120,354 km 2 (52,556,368 mi 2)as Earth's total area. This is the sum of land and water areas within international boundaries and coastlines of all the countries in the world.