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 is movement of molecules of a liquid or a gas from an area of high concentration to one of lower concentration (down a concentration gradient). Diffusion occurs until the molecules are evenly spread out. Diffusion into and out of cells occurs across a selectively permeable membrane and is a form of passive transport as it does not involve energy (ATP) expenditure. Molecules will pass across the membrane as long as 1. They are small enough to pass through the pores in the membrane. 2. they are in solution.