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.
In it's simplest form, unacceptable. If something or someone is ratchet they are a disgrace of sorts because of something about them that it over-the-top and unique in the worst ways. Ratchet people are loud, unattractive in appearance and exploit their unattractiveness in some way most often clothing.