exapoise [EP] Unit Converter

Definition of exapoise [EP] unit

The exapoise (EP) is a unit of dynamic viscosity equal to 10^18 poise in the centimetre–gram–second system. It corresponds to 10^17 pascal-seconds, expressing a fluid’s resistance to deformation or flow under applied shear.

History of exapoise [EP] unit

The exapoise is a modern SI-prefix multiple of the poise, a unit named after French physicist Jean Léonard Marie Poiseuille, whose nineteenth-century research on fluid flow helped establish viscosity relationships in narrow tubes. The poise emerged from the centimetre–gram–second (CGS) system and was later related to the pascal-second in the International System of Units. The prefix exa-, meaning 10^18, was adopted internationally in 1975. Consequently, the exapoise is chiefly a decimal scaling designation rather than a historically common laboratory unit.

Applications of exapoise [EP] unit

Because an exapoise represents an extraordinarily large viscosity, it has little direct use in ordinary fluid measurements. It may appear in theoretical discussions, extreme-material modeling, or historical CGS-based tables describing nearly immobile substances. For practical engineering, scientists normally report equivalent values in pascal-seconds, while the exapoise can conveniently express hypothetical or astronomical viscosities without excessively long strings of zeros.

Complete list of exapoise [EP] unit conversion