SI Units and Symbols used in the THERMODYNAMIC

SI Units and Symbols used in the Guide Subject Physical Quantity Symbol Name Unit Mechanics Mass m, M kilogram kg Linear position Length, Distance Radius x, r  l, d R meter m Time t,  second s Linear angle, Angular position ,  radian rad Spherical angle steradian sr Area A - m2 Volume V - m3 Moment of inertia I - kg*m2 Density - kg/m3

SOME COMMON UNITS of PRESSURE

SOME COMMON UNITS of PRESSURE

1 Pa	Pascal = 1 N/m2 (The SI unit)
1 psi	= 1 lb/in2 (English unit) = 6,891 Pa
1 Bar	= 105 N/m2 = 100 kPa ≈ 1 atm
1 Tor	= 1 mm Hg = 133.3 Pa ≈ 1 kPa
1 atm	= 101.3 kPa = 760 mm Hg = 29.92 in Hg = 14.70 psi