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.
DORIS Name Meaning and History. What Does DORIS Mean and History? From the ancient Greek name &Echo;ÏÏÎ¹Ï (Doris) which meant âDorian womanâ. The Dorians were a Greek tribe who occupied the Peloponnese starting in the 12th century BC. In Greek mythology Doris was a sea nymph, one of the many children of Oceanus and Tethys. It began to be used as an English name in the 19th century. A famous bearer is the American actress Doris Day (1924-).