Recent content by Physics whizz

I have tried searching for it but as I can't think of the actual name for it it won't show me any results as to what I'm looking for. All I really can think of is the example of if you place an olive, grapeor something like that onto a table and place a glass around it, and then start spinning...

I am writing today as a fellow physicist and would like to ask, As I am conducting a very important test which I believe could increase mankinds understanding of the universe, So my question is, What is that long word called where you can spin an olive in a glass without touching the olive?!?