▪️Pressure is force applied over a unit area. Pressure = Force/Area. It's SI unit is Pascal.
▪️️There are 7 base SI units , from which others are derived (which are known as derived SI units)
▪️Pascal is a derived SI unit. It is N.m-2. It is represented by the symbol Pa.
▪️One pascal is equal to a force of one newton applied over an area of one square metre. (N.m−2)
▪️The pascal is a small amount (1 N is equal to just 102 g weight)
▪️For this reason kilopascals (kPa) are used as standard.
▪️The standard atmospheric pressure is: 101.325 kPa = 1.013 bar = 14.696 psi =1 atm
