//Example 5-7 Siphoning Out Gasoline from a Fuel Tank
P_atm = 101.3 //Atmospheric pressure [kPa]
z_1 = 0.75 //height of gasoline free surface from datum [m]
D = 5 //diameter of siphon [mm]
z_3 = 2 + 0.75 //height of point 2 from datum [m]
V = 4 //volume of gasoline required to be drawn in tank [litres]
rho = 750 //density of gasoline [kg/m^3]
g = 9.81 //gravitational acceleration