100/(2n) Half-life (abbreviated t1â2) is the time required for a quantity to reduce to half its initial value. The term is commonly used in nuclear physics to describe how quickly unstable atoms undergo, or how long stable atoms survive, radioactive decay.
Meaning of Kellan. Irish name. In Irish, the name Kellan means-powerful. Other origins for the name Kellan include-Irish, Gaelic, Gaelic.The name Kellan is most often used as a boy name or male name.Irish Name Meaning-powerful. Origin-Ireland.ther origins for the name Kellan include-Irish, Gaelic, Gaelic.The name Kellan is most often used as a boy name or male name.
Evan /evan/ [2 sylls.] as a boys' name (also used less widely as girls' name Evan) is pronounced EV-an. It is of Hebrew, Welsh and Scottish origin, and the meaning of Evan is God is gracious; born of yew; youth. Welsh variant of Iefan, a later form of Ieuan, from John.As a Scottish name it is a variant of Euan. In Celtic, the name means young warrior.It is also used as a short form of Evangelos, which means good messenger in Greek. In Hebrew, Evan means rock.van has 1 feminine form: Vanna. Evan is a very popular first name for men (#312 out of 1220, Top 26%) and also a very popular surname for both adults and children (#13855 out of 150436, Top 9%).