The harmonic mean is the special case of the power mean and is one of the Pythagorean means. In older literature, it is sometimes called the subcontrary mean. The volume-to-surface area ratio for a cylindrical container with height and radius and the mean curvature of a general surface are related to the harmonic mean.
The name SMITH is probably the most common of all surnames. The only names that give it any competition for this title would be Jones and Johnson. The most widely accepted derivation of the name is from the Anglo-Saxon SMITAN and the Germanic verb âSmioanâ meaning to smite or strike.
Smith is the most common surname in the United States, United Kingdom, and in Australia. It is the second most common surname in Canada and the fifth most common in Ireland. The name Smith is believed to be an occupational name for blacksmith, or for those who work with metal. Featured image: Flickr by Loz Pycock.