Volumes of Revolution Cross Sections

ChemE14
Sat, 01 May 2010 21:22:40 +0000

Washer method
V = pi * integral from a to b [ [R(x)]^2 - [r(x)]^2 ] dx, where R is the bigger distance from the axis of revolution and r is the smaller distance from the axis of revolution

That’s the equation in terms of x for finding the volume rotated around an axis. So if you’re rotating around a vertical axis (x=5), then change all the x’s above to y’s. If you provide a specific example, I’ll be glad to work it out step by step.