How do you separate things from centrifugal force?

[scilearner]

How do these machines work?

 

I mean there is no such thing called centrifugal force in real yeah. It is basically inertia. So can anyone tell me how it can be used to separate molecules and how different masses move differently. I haven't see the machine yet so if you can explain that would be great. Thanks!!

[Moontanman]

It works the same way gravity does, denser things displace less dense things out of the way.

[swansont]

http://en.wikipedia.org/wiki/Centrifuge