CAMBRIDGE, England â British scientist Stephen Hawking has decoded some of the most puzzling mysteries of the universe but he has left one mystery unsolved: How he has managed to survive so long with such a crippling disease.
Brownian movement. n. 1. (General Physics) random movement of microscopic particles suspended in a fluid, caused by bombardment of the particles by molecules of the fluid. First observed in 1827, it provided strong evidence in support of the kinetic theory of molecules.
: For diffusion to occur there must be molecular movement which is simply heat. The relationship between heat and motion can be illustrated by observing Brownian Motion which is the random motion of small particles suspended in water due to the uneven collisions of water molecules. is the movement of a substances dissolved in a fluid from areas of higher concentration to areas of lower concentration. This was demonstrated by the movement of janus green dye and by potassium dichromate through getatine. 1  Link to image of rate of diffusion experiment from lab.