bar (3 facts) - An absolute unit of pressure equal to 106 dyn cm-2.
dyne (4 facts) - The force necessary to cause a mass of one gram to accelerate at one centimeter per second per second., A unit of force equal to the force necessary to give an acceleration of 1 cm sec-2 to a mass of 1 gram. 1 dyne of force is roughly equivalent to 1 mg of weight.
erg (9 facts) (dyne cm) - Unit of energy; the work done by a force of 1 dyne acting over a distance of 1 cm.