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seen Aug 27 at 21:36

NTS


Mar
5
comment Dealing with experimental data
Ok, I see, what else would you need to know? The experiment is measuring values of pressure-volume to calculate isothermic curves. We then fit those curves to some equation of state, tipically Van der Waals, as we're dealing with phase transition, and we get the van der Waals coefficients, a, b, and the number of moles, n, I have to get these done for all three numbers. So what I have is 6 values (from six fits to 6 isothermic curves) for a,b,n. And now thinking about it, the error for each of them is the error of the fitting, not a systematic one. How would one approach this?
Mar
5
revised Dealing with experimental data
added 4 characters in body
Mar
5
comment Dealing with experimental data
@dmckee Yes it's wrong, I'm fixing it, thanks, that was a typo.
Mar
5
comment Dealing with experimental data
Thanks for your answer. Systematic is probably a bad translation, I mean the error you make because of the instrument of measurement.
Mar
5
revised Dealing with experimental data
added 8 characters in body
Mar
5
asked Dealing with experimental data
Feb
28
accepted Cylindrical wave
Feb
28
comment Cylindrical wave
Ok thank you, that's good enough
Feb
28
comment Cylindrical wave
Thank you very much, that's what I had tried, to try to find a variable change of the form $u=vr^\alpha$, but I didn't know how to justify a change of that form and not other.
Feb
27
asked Cylindrical wave
Feb
26
accepted Time to emit electrons
Feb
26
comment Time to emit electrons
Thank you for the information
Feb
24
comment Time to emit electrons
That's a part of my question. So theoritically, Einstein said that it would be completely instantanous, like $t=0$? that looks like an infinite aceleration.
Feb
24
comment Time to emit electrons
@EmilioPisanty That's what I was thinking. So today, do we know that value? Is it still smaller than our smallest precission? BTW the value was estimated by supposing all the energy that went through the atom would be absorbed, so we know that the actual time would have to be larger or equal to that.
Feb
24
revised Time to emit electrons
deleted 1 characters in body
Feb
24
asked Time to emit electrons
Feb
19
comment Historic derivation of Wien's law
Thanks for your answer, although I was more interested in the historical derivation of the weak version of the function as I wrote it in the question. Just the way Wien derived it from maxwell's electromagnetism and classical thermodynamics.
Feb
19
comment Historic derivation of Wien's law
@joshphysics Thanks. That article was very interesting. I will try to find that article for free... maybe my university has some copies. Although that article is from year 97, will all sources say that relation was derived in his 93 paper: Eine neue Beziehung der Strahlung schwarzer Körper zum zweiten Hauptsatz der Wärmetheorie, which is also cited in that article, and that sadly it seems like it has no translated version.
Feb
18
accepted Hamilton's equations for a simple pendulum
Feb
18
accepted Magnetic force on capacitor