user1512321

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7 Comments

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Jun
2
 comment starlight flux on earth
Lv is a log2 scale where lv 0 is defined as the light necessary to take a photo with f 1.0 t=1 ISO 100
Jun
2
 comment starlight flux on earth
I was wondering where to ask, but I figured its a physics question because I want a flux value from the celestial bodies and I can figure out the rest.
Apr
12
 comment Computer cooling with dry ice, ideas and question; thermodynamics
CO2 is what's responsible for that chocking feeling. N2, CO, CH4, they'll asphyxiate or intoxicate you gracefully.
Apr
11
 comment Heat of adsorption from fugacity data
I want $\Delta H$, but the equation above requires constant loading, which I don't have. Instead I have the loading as a function of T and P. The information of $\Delta H$ should be within my data, but I don't know how to extract it.
Nov
19
 comment First order phase transition in a classical system
Thank you. Sorry for being nitpicky, but I've always liked the "seams" problems in science.
Nov
19
 comment First order phase transition in a classical system
Very interesting Arnold. My question, I guess, is more about the seam between theory and reality. I can imagine a theoretical system having a discontinuity at it's nth derivative, just like I can imagine a set of (classical) atoms standing perfectly still and achieving 0K. What happens when I add features to the model? Let's say I have a finite set of (classical) atoms at 0K in a rigid box larger than their crystal volume. I start to heat the atoms. Will the jump in Cv be perfectly discontinuous? Won't vacancies (holes) enter the solid and act like a "second component"?
Nov
19
 comment First order phase transition in a classical system
I think you understood my question. I know that one can always get a system with a steeper slope, just like you can (theoretically) get arbitrarily close to 0K, but not 0K.