Drops refused to obey the laws of friction
Physicists have found that drops of liquid is subject to customary laws of friction. Article scientists appeared in the journal Physical Review Letters, and its brief cites Physical Review Focus.
Traditionally, friction is proportional normal component of reaction force support. In fact, this means that, for example, heavy box to pull on the surface harder than light. As it turned out, if the liquid comes to a totally different situation.
In the study researchers also include a few drops of oil volume mikrolitramy a special mechanical arm that revolved around some axis. Thus scientists can change the angle of arm and speed (which allowed researchers to control the different forces acting on the drop).
Behavior of liquid znimalasya located next to the camera.
As a result, scientists were able to establish that an important role in the movement drops playing surface tension. In particular, under a certain ratio of the angle and speed lever turned out that a drop of about 27 percent move easily on the surface (ie, drop the top, bottom surface) than to be suspended for it (ie the top surface, a drop at the bottom). Thus, in the second case, gravity will not prevent the current drops, and help.
Scientists emphasize that their experience was to demonstrate that if the movement of microscopic droplets of fluid forces play a major role, different from usual.