### Unit Operations in Food Processing - R. L. Earle

where K K is called Kick's constant and f c is called the crushing strength of the material, we have: dE/dL = K K f c L-1. which, on integration gives: E = K K f c log e (L 1 /L 2) (11.2) Equation (11.2) is a statement of Kick's Law. It implies that the specific energy required to crush a material, for example from 10 cm down to 5 cm, is the