mass of a Sphere

Noticed a problem with the mass of Spheres.  They have a mass of 1 no 
matter what the radius.  The other off-the-shelf shapes have much 
higher masses with similar sizes.  In the following, a "box" is a Cube 
with side = radius*2.  Cones and Disks have heights of the same order 
of magnitude as their radii.

  box  mass  30607.724658  radius  15.640370
  box  mass  33278.013857  radius  16.082583
ball  mass      1.000000  radius  13.936888
ball  mass      1.000000  radius  15.302530
ball  mass      1.000000  radius  17.154057
cone  mass   2533.730575  radius  13.939634
cone  mass   3247.345469  radius  13.599322
cone  mass   3358.668408  radius  15.739525
disk  mass  10433.040556  radius  16.848354
disk  mass  11958.324823  radius  20.827448
disk  mass  31640.400023  radius  21.779992

Thanks for listening,
Jim Grimes

___________________________________________________

Disclaimer:  Opinions stated herein are my own, and do not reflect 
policies or opinions of the Jet Propulsion Laboratory, NASA, or the 
California Institute of Technology.

James M Grimes                            Phone:  1-818-354-3890
Jet Propulsion Laboratory            Fax:       1-818-393-5239
Section 313 - Flight Systems       E-mail: [email protected]
Mailing  Address:                           Office Location: 301-475U
     Jet Propulsion Laboratory, M/S 301-486
     4800 Oak  Grove Drive
     PASADENA  CA 91109-8099

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