(CNN)Former soap opera actor Nathaniel Marston died after being seriously injured in a car crash, his representative confirmed. He was 40 years old. Marston, who played Michael McBain on One Life to Live from 2004 to 2007 after starring as Alonzo Al Holden on that show from 2001 to 2004, was involved in a single-car accident in Reno, Nevada, on October 30. Soap actor Nathaniel Marston injured in crash.
One cubic yard of concrete weighs around 4,000 pounds. Concrete is measured in cubic yards. Concrete is made out of sand, gravel and cement. Cement is made out of limestone, silica and alumina. Cement is a gray powder that reacts with water to harden the concrete.
The density of concrete varies with its exact composition, but averages around 2,400 kg per cubic meter, or 150lbs per cubic foot. So a cube of concrete 1 foot on each side weighs 150lbs on dry land. We say that this concrete block displaces 1 cubic foot of water. The same volume of sea water weighs 64 pounds, which is the upward buoyant force that is applied to this concrete block when it sits on the bottom of the ocean. The apparent weight of this block will be 86 pounds, which its actual weight of 150lbs (downward force) minus its buoyancy of 64 pounds (upward force).