The internal energy is a state variable, just like the temperature or the pressure. The first law of thermodynamics defines the internal energy (E) as equal to the difference of the heat transfer (Q) into a system and the work (W) done by the system.E2 - E1 = Q-W We have emphasized the words into and by in the definition.hermodynamics is a branch of physics which deals with the energy and work of a system. Thermodynamics deals only with the large scale response of a system which we can observe and measure in experiments.
exists and is an alternate of . Meaning of Troy - What does the name Troy mean? Pronunciation: troi Gender: Boy Name Origin: English Name Meaning: Transferred use of the surname originating from the place-name Troyes in Aube, Normandy. Also, Troy means foot-soldier because of the invasion of Troyes, Greece.
Helen of Troy is a character in Greek mythology. The name was widely used by early Christians due to Saint Helena, the mother of the emperor Constantine I, who according to legend found a piece of the cross on which Jesus Christ was crucified when she traveled to Jerusalem.elen enjoyed a massive burst of popularity in the US during the first two decades of the 20th century where it was one of the top ten names for baby girls, but became less common by 1920.