//Example 5-1 Water Flow through a Garden Hose Nozzle
V = 10 //volume of bucket [gal]
d_hose = 2 //inner diameter of hose [cm]
d_e = 0.8 //diameter of nozzle at exit [cm]
dt = 50 //time required to fill the bucket [s]
rho = 1 //density of water in [kg/L]