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Demore Barnes (born February 26, 1976) is a Canadian actor. Barnes is best known for his roles as Sergeant First Class Hector Williams in the CBS military action television series The Unit, the archangel Raphael in Supernatural and Deputy Chief Christian Garland in Law & Order: Special Victims Unit.
Sergeant First Class Hector Lucian Williams (United States Army, call sign: Hammerhead) (portrayed by Demore Barnes) was a Unit operator assigned to Alpha Team of the 1st Special Actions Group (official cover as the "303rd Logistical Studies Group"). He was an experienced marksman, and frequently served as a sharpshooter for the team.
The first season of The Unit originally aired between March 7, 2006 and May 16, 2006, it introduces the members of The Unit and their families. As the season progresses various plots and story arcs are explored, such as Tiffy Gerhardt's affair with Colonel Tom Ryan and Molly Blane's mission to find the army widow who conned her out of her savings.
"The kilogram, symbol kg, is the SI unit of mass. It is defined by taking the fixed numerical value of the Planck constant h to be 6.626 070 15 × 10 −34 when expressed in the unit J s, which is equal to kg m 2 s −1, where the metre and the second are defined in terms of c and ∆ν Cs." [1] The mass of one litre of water at the temperature ...
Giorgi later identified the need for an electrical base unit, for which the unit of electric current was chosen for SI. Another three base units (for temperature, amount of substance, and luminous intensity) were added later. [1] The early metric systems defined a unit of weight as a base unit, while the SI defines an analogous unit of mass.
However, the names of all SI mass units are based on gram, rather than on kilogram; thus 10 3 kg is a megagram (10 6 g), not a *kilokilogram. The tonne (t) is an SI-compatible unit of mass equal to a megagram (Mg), or 10 3 kg. The unit is in common use for masses above about 10 3 kg and is often used with SI prefixes.
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A derived unit is used for expressing any other quantity, and is a product of powers of base units. For example, in the modern metric system, length has the unit metre and time has the unit second, and speed has the derived unit metre per second. [5]: 15 Density, or mass per unit volume, has the unit kilogram per cubic metre. [5]: 434