1.) Using Ohm's Law, calculate the voltage required for a current of 3 A to flow through a wire with resistance of 2 Ω. 2.) An 18 V battery provides power to a portable electric drill. If the resistance of the drill is 36 Ω, how much current is flowing through the drill?

Water in a partially filled large tank is to be supplied to the roof top, which is 8 m above the water level in the tank, through a 2.2-cm-internal-diameter pipe by maintaining a constant air pressure of 300 kpa (gage) in the tank. if the head loss in the piping is 2 m of water, determine the discharge rate of the supply of water to the roof top in liters per second.