## PHYS208 Fundamentals of Physics II

### Hint for Ch. 27, 41P

a. Divide the "truncated right-circular cone" into a series of cylindrical disks of
infinitesimal thickness *dx* and radii that vary accordingly
from *a* to *b*. Span the series of disks by integrating over the location variable
*x*.
The solution in CD-Physics 2.0 puts the assumption above (infinitesimal disks in series)
on firmer ground.

b. Let *a* = *b*.

"http://www.physics.udel.edu/~watson/phys208/exercises/hints/27-41P.html"

Last updated Feb. 19, 1998.

Copyright George Watson, Univ. of Delaware, 1997.