A long fi xed tube with a rounded nose, aligned with anoncoming fl ow, can be used to measure velocity. Measurementsare made of the pressure at (1) the front nose and(2) a hole in the side of the tube further along, where thepressure nearly equals stream pressure.( a ) Make a sketch of this device and show how the velocityis calculated. ( b ) For a particular sea-level airfl ow, the differencebetween nose pressure and side pressure is 1.5 lbf/in 2 .What is the air velocity, in mi/h?

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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.