Dear Jacques:

"Jacques" wrote in message
...
Dear David,

"N:dlzc D:aol T:com (dlzc)" schrieb im
Newsbeitrag
...

Then let c = 1. There are units systems where that
is true.

I have no problems to understand that. The
consequence of it is E=m, meaning that double mass
contains double energy and half of the mass contains
half of the energy.

Perfect.

What puzzles me is that you can multiply the mass
in kg by the square of the speed of light in m/s and
you obtain exacltly the energy in joule. How is this
possible?

Do you remember force = mass * acceleration? The units systems
are self-consistent.

You will probably want to study:
"dimensional analysis"
.... or ...
"buckingham pi theorem"

If it is not a mere coincidence, which it is not likely
to be, how is it possible? What is the explanation of
this extraordinary fact?

I hope you understand my question.

I do, and whichever of us gets to see God first, can ask Him. We
cannot know "why" this is, only *that* it is so. We get to know
what we measure.

Beyond this we make up "fairy tales" (aka. theories) that allow
us to make new predictions, then test those. Some "fairy tales"
die, some survive for the next round of testing. It isn't much,
but it is all we have.

David A. Smith