noun, plural: filtrations. (1) The movement of water and solutes across the cell membrane due to hydrostatic pressure from the cardiovascular system. (2) The process of separating suspended particles from the fluid through a porous material in which the fluid can pass while the suspended particles are retained.
I think a good typing speed if you need to type a lot would be ideally 80 wpm and minimum 60 wpm. Anything lower than 60 and you'd struggle typing longer texts. I suggest you try TypeRacer - the global typing competition or simply practice touch typing on one of the free typing softwares.
Characters per minute is often used as a metric because the name ignores the length of the words on the typing test. Someone who is typing lots of short, easy to spell words would perform faster than someone who types long, hard to spell words if you are counting words as a unit. A professional or good typist hits around 325 to 335 CPM.