A fluid flows trough a horizontal D$1$ diameter pipe and exits into the atmosphere through a d$2$ diameter nozzle at a velocity V in f$($t$)/($s$).$ Assuming that the viscous effects are negligible and all units are in BG$,$ what is the pressure head $(($P$)/(\backslash$gamma $))$ in the pipe $($in ft$)$ for D$1=3$d$2?$ Express the head as a function of V$.$