Re: a relative question

Before realising the "reply to
author" button e-mailed people directly, I asked a couple of
respondants whether there is experimental evidence that the energy
released in the collision ever exceeds m(of the accelerated
object)c^2.

And there most certainly has. I'll give you one simple example. At the
Large Electron Positron Collider, which has since been decommissioned,
it was a routine event to take two electrons, each having a rest
energy of 0.511 MeV, collide them, and produce a Z particle from that
collision with a rest energy of 91,000 MeV.

Perfect! I'm wrong, but this is exactly what I wanted to know.

And high-speed measurements are routinely done at particle accelerator
collider experiments. Such an effect would have stood out like a giant
swollen thumb by now, and no such effect has been seen.

I appreciate the information. I'm hoping this forum will turn out to
be the place to ask questions like this much earlier in the thought
process. I'm still very interested in this area and wonder how the
general theory effects massive objects when they shift between
inertial frames.

.