How would i calculate the change of flow rate when i have the intial rate, the length, and diameter of tubing ? Say I get an initial flow of 100gph and the tubing the water travels through is .5inch diameter and 16 inches long. What is the flow at the end of the tubing? Could I also calculate how far water goes into the air with a kinematic equation? I am only in general physics but I was wondering this for applicational purposes. Im building a waterfall and want to find the right pump for the output desired.