1 pascal: how many atmospheres, bar, hectopascals, torr?
The pascal, abbreviated to Pa, is a derived metric unit of pressure.
Derived means that pascals can be expressed with help of basic SI units: 1Pa = kg/m x s2 (where ‘m’ stands for the metre and ‘s’ for the second).
Or, the pascal can be also stated as: 1Pa = 1 N/m2 , where N is the newton. In everyday life, we often hear of pressure expressed in hectopascals in meteorological reports but pascals can also be converted to other units of pressure like atmospheres, torr, bar etc.:
|1 Pa =||9.86923267x 10-6||0.00750061683||0.00001||0.01||0.001|
- Torr is a unit which was initially meant to be equal to the ‘millimetre of mercury’ [mmHg]. However, the two units underwent a redefinition which made them different by about 0.000 015%.
- Atmosphere (also known as ‘standard atmosphere’) is a unit based on the average atmospheric pressure at mean sea level.
- Bar is a unit based on atmospheric pressure on Earth at sea level.
Did you know?
The pascal has been named in honour of a 17th century French mathematician, physicist and philosopher, Blaise Pascal. Pascal is renown for his contribution to the study of hydrodynamics.
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