Recent content by mousheng xu

I just watched a youtube video saying that somewhere in a black hole, time is bidirectional (can go to the future and can go to the passed), but space is one-directional. Any introduction material on this subject? Thanks in advance!

You can say that. Or maybe more precisely, given two states: state 1 being the chambers separated by the insulator as described in my previous posts/replies {(n, T1, V), (n, T2, V)}, state 2 being the insulator being removed and gas well mixed {(2n, (T1+T2)/2, 2V)}. What is the difference of the...

What's the maximum work that can be done with the removal of the insulator? Thanks.

Maybe I didn't ask the question the right way. An more appropriate way to ask is: what is the energy (enthalpy?) difference between the hot/cold separated state and the well mixed state. The process of mixing can release workable energy, say, to propel a fan sitting on the insulator. Thanks.

Yes, the two chambers and the whole box are insulated. Thank you!

Apologize if you feel this question to be so simple and naive. Suppose a chamber is divided by a insulator into two equal volume (V) chambers, . One chamber contains n moles of hot oxygen at temperature T1, the other chamber contains n moles of cold oxygen at temperature T2. If you move the...

OK, thanks for the reply in details. Basically you hold the same view as Dr. Nugatory. Please see my reply to him a moment ago. Two more questions: 1) I guess the reason I ask the semi-transparent film question is trying to see if the nature of the interaction between the detector & the...

Q1: What happens to slit 1? Particle pattern? Q2: Well, the particle being a wave exists the same time at each slit with a probability. I assume observing the "yes/no" at one slit collapses the wave to a particle? That said, it seems we won't see a two-slit wave pattern at slits 2 & 3, but a...

1) The so called "wave pattern disappears when particles are observed" is not exactly true, because we observed the wave pattern anyway, be it observed by a film or something similar. it's not true at all, and no one has ever said that it might be. Instead, what is being said is that the pattern...

In a double slit experiment (say, of electrons), when putting a detector to examine the passing of electrons through one slit, the wave pattern of the electrons disappears and instead the particle pattern appears. The classical explanation is that an electron exists both as a wave and as a...