My mind is struggling trying to understand how a decrease in pressure can increase the velocity and vise versa for a fluid that is flowing through a tube of some kind. I've always thought that if you increase the amount of pressure then the velocity should also increase. It appears that they are inversely proportional. P + rho*gh +1/2rho*v2 = K Pressure = F/A = F/pi*r2 Density = m/V I think to understand this problem density plays a part seeing as how it appears in two of the three parts of the equation. Any help would be welcomed. Thanks!