The pascal (symbol: Pa) is the SI derived unit of pressure or stress (also: Young's modulus and tensile strength). It is equivalent to one newton per square metre. In everyday life, the pascal is most commonly used in the form of kilopascal (1 kPa = 1000 Pa). One kilopascal corresponds to about 1% of atmospheric pressure (near sea level). Read more >>

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Pressure (symbol: p) is the force per unit area acting on a surface in a direction perpendicular to that surface. Read more >>