The rule is that a sample is safe when its radioactivity has dropped below detection limits. And that occurs at 10 half-lives. So, if radioactive iodine-131 (which has a half-life of 8 days) is injected into the body to treat thyroid cancer, itâll be âgoneâ in 10 half-lives, or 80 days.
The term 'ratchet' has no less than two distinct meanings. As an adjective, it describes a person, usually a woman, or activity, who is out of hand, out of control, generally whack in some way, dirty, ghetto, unattractive, Crucian, or just generally disliked.
Punk band The Misfits had a song titled Rat Fink. 1  The term fink was originally underworld slang for an informer. It derives from the German word for finch â i.e. one who sings â and is comparable to a stool pigeon. 2  Rat Fink, Official Site of Ed Big Daddy Roth. (n.d.).  3 Sphinx Productions. Sphinx Productions.