Wind tunnels are used to measure the aerodynamic properties of prototype models. (a) if a fan generates a wind speed of 25.0 mi/h inside an 8.75-ft² section of a wind tunnel, what is the wind speed as the air enters the narrower, 4.35-ft² section of the wind tunnel? (b) Explain why it is often windier on city streets surrounded by tall buildings than in more open area
Fluid Pressure
The term fluid pressure is coined as, the measurement of the force per unit area of a given surface of a closed container. It is a branch of physics that helps to study the properties of fluid under various conditions of force.
Gauge Pressure
Pressure is the physical force acting per unit area on a body; the applied force is perpendicular to the surface of the object per unit area. The air around us at sea level exerts a pressure (atmospheric pressure) of about 14.7 psi but this doesn’t seem to bother anyone as the bodily fluids are constantly pushing outwards with the same force but if one swims down into the ocean a few feet below the surface one can notice the difference, there is increased pressure on the eardrum, this is due to an increase in hydrostatic pressure.
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