Recent content by Starman

Temperature is a measure of the average kinetic energy of particles in a system. The energy in the system depends on the number of particles in the system. Also, as temperature increases to very high levels, radiation becomes a significant part of the system. Radiation pressure can actually be...

No, it cannot. The zero-point energy has a minimum value, inherent in the electron being bound to the nucleus. It is not arbitrarily low, it is proportional to the energy of the ground-state. The oscillations of the system ARE relative to the external frame of reference. Again, this is...

I'd retract the canards into the chines, or, looking at it another way, into the forward part of the double-delta. The forward part of a double-delta would be the chines, so oit amounts to the same thing. The cargo-bay would go behind the cockpit in front of the canards, in fact pretty much...

One photon, not two. Photons do not interact with one another. That depends on what you mean by a "vacuum". The theory is that a photon requires interaction with a Coulomb field in order to pair-produce: a nucleus has a Coulomb field, of course, but such fields can (and do) exist...

The net acceleration, that of the tide on the body taken as a whole, will be zero, since tides are a manifestation of the variation of gravitational acceleration with distance. The tidal accelerations are relative to the center of the body being considered.

I'm not talking about the internal KE of the bound system, but the KE of the entire system with respect to the external coordinate system. Not the same thing. This is classical physics. In quantum physics the "wobble" of the nucleus appears as the KE of the entire atom. Granted that this is a...

Temperature is a measure of the average amount of kinetic energy in a collection of particles. Absolute zero is a state where there is no KE whatsoever. However, since all atoms and molecules involve electrons moving about nuclei, there is going to be some residual "wobble" motion inherent in...

Moach: I've just seen the G42-200 for the first time a few days ago. A few remarks: First, the mesh and texture work is superb! Among the best I've ever seen. No surprise if you're in the game industry, but still. I've been building model a/c for FS for years, I am IMPRESSED!! The s/c itself...

2001 ships don't show up! I'm glad to see the new vrsion of WO2001 for 2010, but the ships don't show up! I extracted everything to the correct folders, and as far as I can tell, everything went where it was supposed to go, but no ships. What am I doing wrong?

I'm Back! Hi All: I'm Norman Purves, I teach astronomy & physics at University Hawai'i, Hilo. I uased to post on the old forum, now I've joined the new one. I've built some a/c for Microsoft FS, and some for Orbiter (which I have never uploaded); I have a large backload of 3d models, using...