Recent content by wnvl2

Quantum entanglement is the phenomenon that that the quantum state of each particle of the group cannot be described independently of the state of the others. The joint wave function cannot be factored into individual wave functions. The density operator contains off- diagonal elements...

Complex experiments. :rolleyes: What happens if my entangled particles A and B decohere a little bit with the environment? Is that an easy wat to end up with an entanglement between A, B and the environment? Or is decoherence something absolute - all or nothing - and do I loose in that case...

I start with 2 entangled particles A and B. How can I entangle them with a third particle C without loosing the entanglement between A and B. Is there an example of an experiment?

But if I understand it correctly it will be very small as Dale said in post #26 because of the extinction theorem. That is probably why we do not detect it in practice.

Are you refering here to precursors? https://en.wikipedia.org/wiki/Precursor_(physics) Do you perhaps have a reference where it is explained as simple as possible? So this implies that if you send an EM pulse wave through water a first very little signal arrives with the speed of light in...

I understand that in steady state you have a superposition of waves what makes that the radiation goes slower inside the medium. But if you have a light pulse, how can you explain that the front of the pulse is slowed down? It is difficult to understand that the front of the puls can be...

When a spinor is rotated through 360◦, it is returned to its original direction, but it also picks up an overall sign change. This sign has no consequence when spinors are examined one at a time, but it can be relevant when one spinor is compared with another. Is there an experiment to make an...

Is it possible that it should be (minus signs wrong in eq 1 from ergospherical): ## \varphi = -\pi \mu abc \int_{\xi}^{\infty} \left(1- \dfrac{x^2}{a^2 + s} - \dfrac{y^2}{b^2 + s} - \dfrac{z^2}{c^2+s} \right) \frac{ds}{R_s} ## The same error is present in equation (72) the document from...

But does that mean that when the attractive interactions in a gas increase, but it is not enough to make the gas condensate, that the effect on the entropy is zero or is there a little decrease of the entropy as the molecules are a little bit attracted to each other?

Will the presence of attractive interactions between gas molecules raise or lower the molar Gibbs energy of a gas relative to its ‘perfect’ value? I would think that these attracting forces result in a lower energy state. A decrease in the energy state implies a decrease in the enthalpy. A...

In fact it is not an assignment I have to submit, but I think the policy is that I put this kind of questions here. I am even not a student in chemistry, I just try to understand it. The solution of the exercice is clear. You look up the pH, you draw a vertical line. You see for which E the...

Above 0.1V there is oxidation. Below 0.1V cupper is stable.

Is it correct that a salt bridge in a Galvanic cell makes that there is no electrical field between the solutions of the two hallf cells? Does that mean that the electrical potential (I do not write electrochemical potential) between both solutions is zero in an ideal world? Is it also possible...

Does that mean that if the copper is in a water solution in abscence of oxygen that the copper will not corrode?

Oxygen?