scienceisfun

Ok. Thank you. That definitely helps. Let's say you have a narrow tube that connects to a wide tube with water flowing through it. I still don't get how the velocity just suddenly drops once the water goes into the wider tube (and vice versa - why does the velocity increase when it goes from a wide tube to narrow tube?)

Why is the velocity of a fluid high where the pressure it exerts is low, and why is the velocity of a fluid low when the pressure it exerts is high? Please explain. Thank you.