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.
An average touch typer can type at around 60 WPM (word per minute). Find out how fast you are. Take the typing test now. Key Hero is a great place to improve your typing skills. The game keeps track of all your performances (WPM and accuracy) and helps you understand what type of mistake you make.