Question #5234a
1 Answer
Hyperphysics link to a much more complex answer:
http://hyperphysics.phy-astr.gsu.edu/hbase/kinetic/eqpar.html
The Theorem of Equipartition of Energy.
At stationary equilibrium a molecule has as much potential to move along any degree of freedom as any other.
0 is not recognized as a dimension so when stationary, it can be said that the molecule is moving along all three dimensional axes simultaneously giving the illusion of being stationary.
In 8d hyperspace where inside and outside, internal vibration, rotation, and four axes (associated to the vertices rather than faces of a cube) are under consideration, a molecule can rotate and/or vibrate internally and stay still or it can rotate and/or vibrate internally and move (Brownian motion) rather than being considered static so it doesn't have to be recognized as moving in multiple directions at once.
I might always be wrong.