  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.
GHB, or Gamma-hydroxybutyrate, is a depressant that affects the central nervous system. It first became popular as a club drug at all-night dance parties and raves. It is sometimes used in combination with other party drugs, like Ecstasy and alcohol, which increases its risks, and can be lethal.HB, or Gamma-hydroxybutyrate, is a depressant that affects the central nervous system. It first became popular as a club drug at all-night dance parties and raves. It is sometimes used in combination with other party drugs, like Ecstasy and alcohol, which increases its risks, and can be lethal.