Look on the hoses and gaskets to find from where the fluid could be leaking. Add power steering stop leak additive to your power steering fluid. Lucas Power Steering Stop Additive is 100 percent guaranteed to stop seal leaks. In older cars, the seals shrink, causing leaks.
Diffusion is the net movement of molecules or atoms from a region of high concentration with high chemical potential to a region of low concentration with low chemical potential.
Diffusion allows substances to pass into or out of cells across the cell membrane-but they must be dissolved and there must be a concentration gradient present between the solutions on either side of the cell membrane. Diffusion is a very important exchange process which is widely used in living organisms.