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.
Define racket. racket synonyms, racket pronunciation, racket translation, English dictionary definition of racket. racket1 top: tennis and racquetball rackets bottom: squash racket also racÂ·quet n. 1. A device consisting of an oval or circular frame with a tight...