In the diagram attached I have a pipe (standard concrete) that is going from point A (Entrance) to point B (Exit). Standard water is the fluid within the pipe. Point A (entrance) has a constant uninterrupted supply of water at a velocity of 0.7m/s, how do I find the correct velocity at point B (Exit), given that the distance is between point A and Point B is very long? This problem is going around in my head for quite some time now. I have used Bernoulli’s equation to solve for V at point B but I am concerned about the length of the pipe and that neglecting it may be over simplifying the problem. Could it not reduce the velocity over a long distance?