The rule of thumb is to consider that a 94 lb. bag of cement will make one cubic foot when it is freshly packed. The density of lightweight concrete is 1920 kg per cubic meter or 116 lbs per cubic foot (3132 lbs per cubic yard).Lightweight concrete weighs less because it is made with an aggregate called pumice, a naturally light mineral.Density is simply a mass to volume ratio.he rule of thumb is to consider that a 94 lb. bag of cement will make one cubic foot when it is freshly packed. The density of lightweight concrete is 1920 kg per cubic meter or 116 lbs per cubic foot (3132 lbs per cubic yard).
amblyopia amÂ·blyÂ·oÂ·piÂ·a (Äm'blÄ-Å'pÄ-É) n. Dimness of vision, especially when occurring in one eye without apparent physical defect or disease.
While treatment improves vision, it does not typically restore it to normal in the affected eye. Amblyopia was first described in the 1600s. The condition may make people ineligible to be pilots or police officers. The word amblyopia is from Greek á¼Î¼Î²Î»ÏÏ amblys meaning blunt and á½¤Ï Åps meaning sight.