"K1TTT" wrote
...
On Jul 5, 5:14 pm, "Szczepan Bialek" wrote:

Is is trouble with understanding that the all scientists work on plasma?
Only students are in the solid aether. But they simply do not know that
the
famous equations describes such.
Vectors describes the motions of something. Students should not be told
what
it is. Because the goal is math (field method) teaching.

its too hot for this, i'm going for a swim... maybe some nice
longitudinal waves in the water will make me feel better.

Next time look at water waves with the Stokes eyes:
http://en.wikipedia.org/wiki/Stokes_drift

They are more longitudinal than transversal. They transport the mass and the
energy.
S*