In order to understand the correct situation in which to use the word affect or effect, the first thing one must do is have a clear understanding of what each word means. 1  Affect is usually used as a verb. It is an action word that means to produce a change in or influence something. 2  Effect is usually used as a noun.
Shear Factor. The distance a point moves due to shear divided by the perpendicular distance of a point from the invariant line.
Marginal factor cost. In microeconomics, the marginal factor cost (MFC) is the increment to total costs paid for a factor of production resulting from a one-unit increase in the amount of the factor employed. It is expressed in currency units per incremental unit of a factor of production (input), such as labor, per unit of time.