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.
The same as a ratchet, but what you whisper to your friend when they are in your presence so they don't know what you're saying. Derived from the word ratchet, which is derived from the tool, hence wrench. Can be used singular or plural. Fuck, too many wrenches up in here.