Air (density 1.2 kg/m³) flows through a horizontal pipe with negligible energy loss due to friction. The flow is steady and incompressible. The average velocity and pressure at a certain cross section in the flow are 40 m/s and 220 kPa respectively. If the velocity at some other cross section is 30 m/s, what is the pressure? O 570.0 kPa O 220.4 kPa O 226.0 kPa O 219.6 kPa O 640.0 kPa

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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.