Ok just to clarify one thing for you regarding a lot of comments here: when they say that faster air flow has less pressure, they actually mean static pressure. Bernoulli equation says (in general) that total pressure is constant and total pressure is sum of static (p/rho) and dynamic pressure (v^2/2). If you increase one component ( speed, for example) then the other component must become lower (static pressure p). There is also a gravitational component of this sum (g*h), but it is neglected in most of the calculations which include gases because of the low density. This method is used for calculation of air speed of the plane. You will often see a thin pipe at the front of an airplane – this instrument is using Bernoulli principle to determine air speed of the plane… Wow this is more like ELI25
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