Volume 2 : 3 ratio of the volumes of the sphere and cylinder is credited to Archimedes. The volume of a sphere is the integral of an infinite number of infinitesimally small circular disks of thickness "dx". The calculation for the volume of a sphere with center 0 and radius "r" is as follows. The surface area of the circular disk is formula_10. The radius of the circular disks, defined such that the x-axis cuts perpendicularly through them, is or where y or z can be taken to represent the radius of a disk at a particular x value. Using y
X: Beyond the Frontier X: Beyond the Frontier X: Beyond the Frontier is a video game created by Egosoft for Windows. The first of the "X" series, it is a space trading and combat simulator game, mostly set in the fictional X-Universe. Upon release, it was frequently compared to the older Elite. An expansion, X-Tension, was released in 2000. Four full sequels have since followed: "" in 2003, "" in 2005, "" in 2008 and "" in 2018. "X: Beyond the Frontier" and "X-Tension" were released in together as "X-Gold" in 2000. A novel, "Farnham's Legend", is based on the plot of "X: Beyond