And what this allows us to do is it basically allows us to separate the different components inside our homogenic mixture based on things like mass, density, size and shape, as we'll see in just a moment. But first, let's actually discuss briefly the physics behind the process of centrifugation. Let's see how it actually works. So let's suppose we take our test tube and we place it inside our centrifuge and it begins to rotate in the counterclockwise direction. So basically in this direction, as shown. So this is position one.