  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.
Anti Hbs is a titer measuring antibodies to the hepatitis B surface antigen. Anti Hbs reactive means that you are immune to hepatitis B, either due to previous immunization or â¦ recovery from hepatitis B.t is a pencil gradation system. HB means hard black B means black and 2H means harder. H (2H, 4H, etc) are the harder leads, and therefore draw a lighter line; and B (2B, 4B â¦ , etc) are the softer leads, and therefore draw a darker line. HB is the very middle.