where P is the pressure, ρ is the density of the fluid, v is the speed of the fluid flow, and y is the vertical position from y=0 m (you can, of course, pick any point ...where P is the pressure, ρ is the density of the fluid, v is the speed of the fluid flow, and y is the vertical position from y=0 m (you can, of course, pick any point to be y=0 m---this is equivalent to picking any spot to be the zero of potential energy, but once you have picked the y=0 m spot you must be consistent).
