NASA WING | Fluid Density Drop Tower Experiment 

This drop tower experiment was a part of What If No Gravity? (WING). WING is a NASA educational program for teams of students to design and build an experiment to be tested in a NASA microgravity drop tower.
In the tube, there are two different liquids, and they both have different densities. As the tube is dropped, watch how the density of the liquids is affected by microgravity.