The Method of Mechanical Theorems convenient to use a little bit of coordinate geometry. If a sphere of radius 1 is placed with its center at "x" = 1, the vertical cross sectional radius formula_2 at any "x" between 0 and 2 is given by the following formula: The mass of this cross section, for purposes of balancing on a lever, is proportional to the area: Archimedes then considered rotating the triangular region between "y" = 0 and "y" = "x" and "x" = "2" on the "x"-"y" plane around the "x"-axis, to form a cone. The cross section of this cone is a circle
4-D (The X-Files) 4-D (The X-Files) "4-D" is the fourth episode of the ninth season and the 186th episode overall of the American science fiction television series "The X-Files". The episode first aired in the United States on December 9, 2001 on the Fox network. It was written by Steven Maeda and directed by Tony Wharmby. The episode is a "monster-of-the-week" episode, a stand-alone plot which is unconnected to the mythology, or overarching fictional history, of "The X-Files". The episode earned a Nielsen rating of 5.1 and was viewed by 5.38 million households. It received mixed to positive reviews from television critics. The