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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.
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.
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.
Jonas, Bob, and Charles return to Washington, D.C., and rendezvous with Colonel Ryan. They try to find the person responsible for the dismantling of the Unit and try to clear their name. Meanwhile Hector is being transported to a Senate subcommittee hearing to testify against the Unit and Mack is held at a secret prison.
The law can be formulated mathematically in the fields of fluid mechanics and continuum mechanics, where the conservation of mass is usually expressed using the continuity equation, given in differential form as + =, where is the density (mass per unit volume), is the time, is the divergence, and is the flow velocity field.
Specific volume is the volume occupied by a unit of mass of a material. [1] In many cases, the specific volume is a useful quantity to determine because, as an intensive property, it can be used to determine the complete state of a system in conjunction with another independent intensive variable. The specific volume also allows systems to be ...
Then by the definition of F, F t, s (x) is the state of the system at time t and consequently applying the definition once more, F u, t (F t, s (x)) is the state at time u. But this is also F u, s (x). In some contexts in mathematical physics, the mappings F t, s are called propagation operators or simply propagators.
In physics, chemistry, and other related fields like biology, a phase transition (or phase change) is the physical process of transition between one state of a medium and another. Commonly the term is used to refer to changes among the basic states of matter : solid , liquid , and gas , and in rare cases, plasma .