For closed systems with no external source or sink of energy, the first law of thermodynamics states that a system's energy is constant unless energy is transferred in or out by mechanical work or heat, and that no energy is lost in transfer. This means that it is impossible to create or destroy energy.
GROGAN. The Irish name Grogan is derived from the native Gaelic O'Gruagain Sept that was initially located in County Roscommon but which became widely dispersed. The name is derived from a Gaelic word meaning 'fierceness'. Grugan, Groggan, Groogan and O'Grogan are among the variants of this name.he Irish name Grogan is derived from the native Gaelic O'Gruagain Sept that was initially located in County Roscommon but which became widely dispersed.
Griff /griff/ [1 syll.] as a boys' name. Griff's root is Latin, and Griff means hooked nose. Griff is an alternate spelling of Griffin (Latin): in Greek mythology and medieval legend.Compare surname Grief.ow popular is Griff? Griff is an unusual given name for males but a very prominent surname for all people (#44027 out of 150436, Top 29%). (2000 U.S. Census). Griffin (#241 the previous year) is the only prominent alternative form of Griff (not ranked) rated in the Top 1000.