  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.
Medical Definition of FURFURAL. : a liquid aldehyde C5H4O2 of penetrating odor that is usually made from plant materials and used especially in making furan or phenolic resins and as a solvent. Britannica.com: Encyclopedia article about furfural. a liquid aldehyde C5H4O2 of penetrating odor that is usually made from plant materials and used especially in making furan or phenolic resins and as a solvent. Britannica.com: Encyclopedia article about furfural.