If you watch water falling from a faucet, you will notice that the flow decreases in radius as the water falls. This can be explained by the equation of continuity, since the cross-sectional area of the water decreases as the speed increases. If the water flows with an initial velocity of 0.62 m/s and a diameter of 2.2 cm at the faucet opening, what is the diameter of the water flow after the water has fallen 30 cm?