In the US for example the standard is 110V for voltage and 80psi for water. In Europe, voltage is 220V, is water pressure different there too?
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A bar is 100,000 Pa or 100.000 Pa. Why not use KPa? Why set a separate unit to be 1E+05?
Because 1 bar is almost atmospheric pressure. Oddly enough I’ve never seen anyone use kPa, weather forecasts often use hPa (instead of mbar) to report atmospheric pressure.
No idea what is the story behind it, or if there is a practical reason.
