  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.
What is GHB? GHB or Gamma Hydroxybutyrate (C4H8O3) is a central nervous system (CNS) depressant that is commonly referred to as a âclub drugâ or âdate rapeâ drug. GHB is abused by teens and young adults at bars, parties, clubs and âravesâ (all night dance parties), and is often placed in alcoholic beverages.