Nickel is an important element in the metal alloy industry. In Indonesia, nickel resources are found many areas form of rocks such as pyrophyllite. Froth flotation a method commonly used mining industry to extract metals from mineral rocks. However, concentrates yields tend be relatively low. This often influenced by several factors pH solutions and stirring speed process. Therefore, this study...

By shining a tightly focused laser light on a Bose–Einstein condensate (BEC) and moving the centre of the beam along a spiral path one may stir the BEC and create vortices. It is shown that one can induce rotation of the BEC in the direction opposite to the direction of stirring. When a spoon, stick or another object of a similar shape is used to stir a liquid, the liquid rotates in the directi...