Using the mechanical energy balance, estimate the time required for the water level to drop from an upper piece of tape (42.0cm) to the lower peice of tape (34.0cm) on a cylindrical tank. The diameter of the tank is 30.0cm. At the bottom of the tank there is a cylyndrical pipe (0.9 cm diameter) extending from the bottom of the tank into a bucket (32cm below the tank). This pipe has a valve attached to it that controls the flow of the water out of the tank. Neglect frictional losses.