On May 11, 12:14*pm, "Jacques" wrote:
Hi everybody,

I have a question which bothers me since long time and maybe with your help
I can find the answer at last. Since I heard the formule E=mc^2 for the
first time it struck me that there seems to be no logical relation between
the energy contained in a mass and the speed of *light. I have no
difficulties to understand that the energy contained in a mass is equivalent
to that mass.

I have difficulties understanding your statement that you have no
difficulties to understand that the energy contained in a mass is
equivalent to that mass.


My problem is: what the hell has this to do with the speed of something else
(an electromagnetic wave). I cannot see the connection between them.

You sit in a train moving at a contant speed and you watch a house of
mass m the train is passing by. What is the kinetic energy of the
house in your frame of reference?

Mike