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5 tube balancing argument

Chris Boyd chrisb at hgu.mrc.ac.uk
Mon Oct 14 11:52:16 EST 1996

Hiranya Roychowdhury (hroychow at NMSU.EDU) wrote:
: At 01:53 PM 10/9/96 EDT, Zhiyong Zhao wrote:
: >You can balance 3 tubes in a 12-hole rotor. However, when you add another 2 tub
: >es in you actually disturb the first balance and creat a new unbalanced situati
: >on. So, each 3-tube or 2-tube group can be balanced, but putting them together
: >you will have a totally different thing.
: >
: >Zhiyong Zhao
: >Penn State
: >

: You are wrong. 

The original poster and Hiranya are quite right.  In a standard
12-space radial rotor, you can balance any number of equal weight tubes
except 1 and 11.  "Ye cannae change the laws of physics".

Best wishes,
Chris Boyd                       | from, | MRC Human Genetics Unit
chrisb at hgu.mrc.ac.uk             |  not  |  Western General Hospital
http://www.hgu.mrc.ac.uk/~chrisb |   for |   Edinburgh EH4 2XU, SCOTLAND

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