J.C.MacSwell

Mine is. As a matter of fact I've never seen one that wasn't.

You have to work at it. Shampoo the dog, using a flea comb while you do it. Flea shampoo works best. You have to get rid of the flea eggs as well as the fleas. Don't assume you have won when they seem to have gone away. You will have missed some eggs, so repeat in a couple of days and again in a couple more to make sure. Same thing with vacuuming any carpets, and especially wash the dogs bedding every couple of days. Any carpeting you can temporarily remove or isolate the dog from helps as well. If you are very diligent you should be able to avoid fumigation etc.

Just getting their is unlikely enough, for anything approaching a recognizable amount of something (or even a small fraction of that) but classically this remote (read extremely absurdly remote) possibility still exists, and it's relatively simple to prove it.

I'm a sometimes spiritual weak agnostic. I cannot understand Strong Atheism, though I doubt there is any harm in it, or taking the Bible literally. I respect most religions, especially taken in their historical context, though often not the way they are interpreted and followed.

If the system was my house including everything in it, I still have a temperature, yet I am not in equilibrium with the rest of the system. Conservation of energy would be broken if a closed system could reach 0 Kelvin, but I cannot see how a definable isolated part of the system could not reach 0 K in classical theory, however statistically unlikely.

I usually see it referred to when strength far beyond anything known is required in some thought experiment. But otherwise it is normal matter.

If the Paddle was simply a neutron would it radiate? Not sure if it could have a temperature but it would certainly accelerate during the process. I may have asked you this before but have forgotten. I think the answer was yes, due to its positive and negative parts even though it is neutral, somewhat similarly to an atom. The only refutation of the Demon (beyond the obvious you have stated) that I have heard is a quantum one with regard to the Demon's uncertainties in the knowledge of the particles and the gate (now paddle in this case) One other point is that classically if you could start out with some part of a system at absolute zero it would not remain that way very long, the system would move to a different state. Since classical mechanics is reversible, this should prove (assuming classical mechanics) that absolute zero could be achieved. The "different state" could move to the original in theory, no matter how unlikely.

Classically I think this is correct, although "some point", for a minutely small sample could be billions upon billions of years (?). Non classically if our sample reached (not sure if it could) exactly zero K, we could not know where in the Universe it is.

The contraction is only in the direction of the movement. It would not contract in the orthogonal directions.

Water is still King for heat capacity for it's mass (and cost).

Wouldn't you have an infinitesimal chance of a shot at it classically? (Or perhaps Maxwells Demon could create it, by slowing all heat energy to zero, not using a gate but a paddle and expelling the energy outside the system)

1. Also takes gravity as much effort to drop the hammer from the same ledge 2. The gravitational effect of two feathers on each other is less than two hammers on each other It is the same as what the moon exerts on the feather or hammer respectively. Obviously this force will not displace the moon very much though, so it is usually ignored. (though I knew you knew alll that)

It would of course roll around on the floor.

This makes me think it has some kind of multidimensional quantum spin:D

yes

Thanks. I assume these two (that I bolded above) are related. Interesting.

Can a free electron interact with and absorb some of the energy and momentum of a photon?

Yes. Less energy would be extracted from the system than otherwise.

Somewhat. Similarly all events would be connected, regardless of when or where they took place. However they cannot all be causally connected as per relativity.

I would say that it is something. Without it everything happens at once and in the same place.

No wonder it hurts when it hits you straight into the back of the eyeballs!

I like this idea IA. As long as the foam is fully saturated you are only dealing with the shock wave. And if it is not quite fully saturated much of that would be reduced without excessive pressure differential (other than the shock wave). A good time to fine tune this would be around breakfast time with a large family. It might break the yolks but not the shells.

Tension can point toward the centre but depends on the structure as well as the external forces.

If the strings all meet at 120 degrees the static tension would be all equal, though I suspect waves on two of them meeting at the apex simultaneously would not completly constructively interfere down the third string but also have two secondary waves rebounding back down the two original strings.

And of course the equation still holds, the coefficient may change, but usually not by much for the reasons you mention.