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 occurs in gases and with any substance in a solution. Therefore we can say that the definition of diffusion is as follows: Diffusion: The movement of particles from an area of high concentration to an area of low concentration until they spread out evenly. There are two important rules to remember. The larger the particles the slower the rate of diffusion. The greater the difference in concentration the greater the rate of diffusion. This difference is known as the concentration gradient. Example of diffusion in plant cells; Example of diffusion in animal cells