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.
[ 3 syll. sien-na, si-e- nna ] The baby girl name Sienna is pronounced as Siy-EH N-aa- â . Sienna is mainly used in the English language and its language of origin is Italian. The meaning of the name is reddish-brown; city in Tuscany. It represents the transferred use of the geographic name as a given name.The English Kienna, the name Siena, the name Siene, the name Siennya, the name Sienya, the name Syenna, the name Syenya, and the name Syinna are variant forms of Sienna.Sienna is popular as a baby girl name, and it is also viewed as rather trendy.The name has been increasing in popularity since the 1990s; prior to that, it was of sporadic use only. At the modest height of its usage in 2007, 0.099% of baby girls were given the name Sienna.he meaning of the name is reddish-brown; city in Tuscany. It represents the transferred use of the geographic name as a given name. The English Kienna, the name Siena, the name Siene, the name Siennya, the name Sienya, the name Syenna, the name Syenya, and the name Syinna are variant forms of Sienna.