  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 is short for gamma hydroxybutyrate, a drug popular among teens and adults that are always involved in partying and going to clubs. Many countries consider this drug as an illicit drug or have it regulated in terms of sale and use. This drug is also known as 4-hydroxybutanoic acid or sodium oxybate.HB is also a popular date rape drug, especially among teens. Aside from its liquid form, GSB also has a powder form which can be taken as is or mixed with drinks. GHB is also known to cause several side effects, with many of them very serious.