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
Ruhrstahl X-4 X-7, the Nord SS.10. 200 units were manufactured between 1947 and 1950. However, the program was disbanded due to the dangerous pre-flight refuelling involved (the hypergolic nitric acid and Tonka combination was highly explosive). Ruhrstahl X-4 The Ruhrstahl Ru 344 X-4 or Ruhrstahl-Kramer RK 344 was a wire guided air-to-air missile designed by Germany during World War II. The X-4 did not see operational service and thus was not proven in combat but inspired considerable post-war work around the world and was the basis for the development of several ground-launched anti-tank missiles, including the Malkara. During 1943, the RAF's Bomber