A applet to look at solids of revolution and the integral to find the volume.[br]This works best as a downloaded applet.[br][url]http://www.geogebratube.org/material/show/id/339111[/url]

The function and viewing region can be changed,[br]The right and left ends, the axis of rotation, and the position of the integration disk are controlled by draggin points in the 2D window.