Fahrenheit scale A temperature scale devised by Fahrenheit (1686-1736) on which the freezing point of water is 32 degrees and the boiling point of water is 212 degrees, both at standard pressure. (This scale is still used in the U.S.)
faithful action An action )g : M → M , g ∈ G, of a group G on a space M is called faithful or effective if )9 = idM implies g = e.
faradaic current A current corresponding to the reduction or oxidation of some chemical substance. The net faradaic current is the algebraic sum of all the faradaic currents flowing through an indicator or working electrode.