In the Anglo-Saxon world, namely in the USA, the units around pounds and inches are common. The prefix milli is also commonly used with bar for small pressure values: pressures below 1bar are often indicated in mbar (millibar). Therefore, "Pa" very often has to be prefixed with hecto (hundred), kilo (thousand) or mega (one million) in order to indicate the pressure value with numbers that are reasonably easy to read. For example, one bar corresponds to 100,000Pa.
The disadvantage of Pascal is that the unit corresponds to a very small pressure, which is not commonly used in everyday life. The advantage of pascal is that you do not have to convert this pressure unit when it is used in physical formulae, as these are normally built on the SI base units.
One pascal corresponds to the product of the SI base units kg * m * s⁻² or, in derived SI units, N/m². SI stands for Système international d'unités, a system of units for physical quantities that is used worldwide and whose units are prescribed in business and official transactions in many countries. In industrial applications, too, the indication in bar is frequently encountered, for example the pressure in pneumatic systems is often about 6 bar, while in hydraulic systems between 250 and 600bar are measured. 2bar to just under 10bar (for racing bicycles), the pressure at a depth of 10m in water is approx. 1bar, air pressure in the tyres of bicycles and cars from approx. This can be explained, among other things, by the fact that most of the pressures we encounter in everyday life can be expressed in simple numbers in bar: Atmospheric pressure approx. The most widely used unit for expressing pressure worldwide is "bar".
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