How does a normal pipette work?

Hello guys,

This might seem a basic question but my physics is not that good. So in a normal pipette when you squeeze the top bit, do you create an area of high pressure there, and then when you put in a flask with liquid and release it the air escapes, and then the atmospheric air pushes on the liquid and fluid comes into the pipette. Is that what happens? Thanks

 

Hello Borek long time,

Ok thanks for the reply. Then why do some people keep the pipette squeezed and then put it into liquid and then release it to get the liquid. When you keep it squeezed haven't you already released the air? So how is air released again when you release it?

 

Ok I see it was a simple question after all. Thanks for the help Borek.