Volumes of Revolution Cross Sections

ChemE14
Sat, 01 May 2010 13:35:21 +0000

If the axis-of-revolution is horizontal (y=), then the function has to be in terms of x and you integrate with respect to x.

If the axis-of-revolution is vertical (x=), then the function has to be in terms of y and you integrate with respect to y.

Then all you have to do is identify big R and little r (for washer method). Big R is the larger distance from the region to the axis-of-revolution, and little r is the smaller distance to the axis-of-revolution.