The relative motion of the two creates eddy currents in the copper.
This creates opposite currents in the liquid and mixes it more efficiently.
These forces create corresponding motions or currents in the world's oceans.
The second is to create, where wanted, currents in the water and turbulence at the surface.
Winds create currents through friction, setting up slow but stable circulations of water throughout the sea.
These are thought to play some role in feeding, perhaps by creating currents of water that help bring food closer to the beak.
These animals feed chiefly by creating currents of water through their bodies.
This twice daily peristalsis creates tidal currents every six hours, pushing sea water first north, then south.
As a result cyclostomes create less powerful feeding currents.
It is why they have not seriously engaged with trying to create liberal currents in civil society in the Muslim world.