The movement of a solvent through a membrane separating two solutions of different concentrations. The solvent from the side of weaker concentration usually moves to the side of the stronger concentration, diluting it, until the concentrations of the solutions are equal on both sides of the membrane.
We manage Trafalgar Square, one of Londonâs most vibrant spaces in the middle of the city. Find out about the history of this heritage site, its statues and its fountains.
Cheap Hotels near Times Square, New York. What to see. Times Square, in the centre of Manhattan, is an enormous, dazzlingly illuminated pedestrian square which has become one of the city's biggest tourist attractions.