In article <3fb53d4c$1@news.povray.org>,
 "Andrew Coppin" <orp### [at] btinternetcom> wrote:

> * What is the volume of a sphere of radius R?

4/3*pi*r^3


> * Anyone know the approximate density of iron?

~7.8g/cm^3


> Unless I'm horribly mistaken, SB should bounce off SA at an angle (WHICH
> angle??), transferring only some (HOW MUCH?) of its momentum to SA.

http://www.google.com/search?q=sphere+collision

-- 
Christopher James Huff <cja### [at] earthlinknet>
http://home.earthlink.net/~cjameshuff/
POV-Ray TAG: chr### [at] tagpovrayorg
http://tag.povray.org/

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