Reputation: 1571. E-filed in Early February and it took about 7 weeks to get my refund. It might have something to do with the amount as well. I got back $1,500 from the state which is probably more than most people get, so it could have taken longer for the larger payment.
Diffusion and Osmosis. Diffusion. -the process by which molecules spread from areas of high concentration, to areas of low concentration. Concentration gradient - a difference between concentrations in a space. Molecules will always move down the concentration gradient, toward areas of lesser concentration.
Diffusion. - The structure of the cell membrane controls what moves in or out of a cell. Particles-moving in all directions, bumping into each other, eventually spread out evenly throughout the cell (diffusion). - Diffusion plays a part in moving substances into and out of a cell. A cell membrane allows some substances to enter or leave the cell, while stopping other substances. It is a selectively permeable membrane.