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
X-75 Volume 1 X-75 Volume 1 X-75 Volume 1 is the debut album by Henry Threadgill released on the Arista Novus label in 1979. The album and features four of Threadgill's compositions performed by Threadgill with Douglas Ewart, Joseph Jarman, Wallace McMillan, Leonard Jones, Brian Smith, Rufus Reid, Fred Hopkins and vocals by Amina Claudine Myers. The Allmusic review by Brian Olewnick states, "Henry Threadgill's first album as a leader immediately plunged into experimental waters. He utilized a nonet the likes of which had certainly never been heard before and probably not since... Threadgill's massive talent for mid-size band arrangements is immediately apparent...