2. A cylindrical tank 5 ft high has a constant diameter of 4 ft is full of water. The tank has a hole in its bottom that measures 0.1 ft2. All losses are insignificant. How long will it take for the tank to empty? Note that you can NOT assume a static head and constant flow rate because the water head in the tank decreases as the water flows out of the tank. (A) 35 sec (B) 70 sec (C) 105 sec (D) 140 sec

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Fluid Dynamics

The study of the flow of gases and liquids, usually in and around solid surfaces, is known as fluid dynamics in physics and engineering. Fluid dynamics, for example, can be used to evaluate the movement of air through an airplane wing or the surface of a vehicle. It can also be used in ship design to increase the speed at which ships pass through water.