Arc Length and Surfaces of Revolution

Arc Length

http://archives.math.utk.edu/visual.calculus/5/arclength.1/

Arc Length Tutorial

http://www.math.hmc.edu/calculus/tutorials/arc_length/

Arc Length and Surface Area

http://www.ugrad.math.ubc.ca/coursedoc/math101/notes/moreApps/arclength.html

Area of Surface of Revolution

http://library.thinkquest.org/3616/Calc/S3/AoSoR.html?tqskip1=1