  Crushed stone, for example, has a density of 100 pounds per cubic foot (lb/ft3), which is 1600 kilograms per cubic meter (kg/m3), which is 1.6 metric tons per cubic meter. Packed earth is about 95 lb/ft3, or 1520 kg/m3.
Harvard Business Review. Harvard Business Review. The Harvard Business Review (HBR) is a general management magazine published by Harvard Business Publishing, a wholly owned subsidiary of Harvard University. It is published 6 times a year and is headquartered in Brighton, Massachusetts.
Petroleo Brasileiro SA (PBR) is not recommended at this time, holding a Dividend.com DARSâ¢ Rating of 3.4 out of 5 stars. Be sure to visit our complete recommended list of the Best Dividend Stocks, as well as a detailed explanation of our ratings system here.