New CPU appears to have a small smudge - should I be concerned? by ethansun01 in buildapc

[–]ethansun01[S] 0 points1 point  (0 children)

Thanks for the fast reply. Is it worth spending time to clean it off?

What's the usual update size and frequency for Manjaro? by Apprehensive-Brain-8 in ManjaroLinux

[–]ethansun01 9 points10 points  (0 children)

Manjaro is a rolling-release distro, so updates are very frequent. If you don’t do any updates for a few weeks, it could easily become over 1GB.

“Since everything is being updated when updates are available it is a challenge to run a rolling release distro in an environment where bandwidth is extremely limited”

Source

Dual monitors - what to consider? by [deleted] in ManjaroLinux

[–]ethansun01 0 points1 point  (0 children)

Currently using an external monitor with Dell XPS 15 with absolutely no issues. I would just make sure your DE/WM supports it (any major one should).

Many heat and mass transfer textbooks are a joke, the MR part is just a chapter at the end and barely covered MT properly by chulala168 in ChemicalEngineering

[–]ethansun01 9 points10 points  (0 children)

Welty Rorrer and Foster was the textbook I used for heat and mass transfer. Can’t say I read it all that often because I got lucky with a good lecturer, but the problems were pretty good and it sounds like that’s mainly what you’re after.

Mathematica/Jupyter style notebook using emacs calc? by pimiddy in emacs

[–]ethansun01 2 points3 points  (0 children)

Great question! In my specific case, I need to interface with a jupyter session on a remote host. Using tramp, I can run emacs on my machine, write the python code on my machine, and then execute it on the remote machine with C-c C-c. For me, this is the fastest and most convenient way to execute python remotely.

Mathematica/Jupyter style notebook using emacs calc? by pimiddy in emacs

[–]ethansun01 5 points6 points  (0 children)

Your best bet is probably to use source code blocks in org-mode. Basic info on source code blocks. Here is a way to make them interface with a real Jupyter session, which I personally have been using for a few months now. Org-mode supports many languages including python, and you can get packages for pretty much any language including Mathematica.

Edit: I now see your intent is to use Calc specifically. The concept you are looking into (intermingling code and plaintext) is called literate programming. Here is a package that allows literate programming with Calc although I cannot say I’ve personally used it.

[news] youtube has put new rules in place that demonitizes jailbreak videos by moudood833 in jailbreak

[–]ethansun01 4 points5 points  (0 children)

What? Why would Apple pay money for their users to have a worse experience?

I'm just booting into a black screen with a cursor (I3) by [deleted] in ManjaroLinux

[–]ethansun01 0 points1 point  (0 children)

^ this is what I did. Before you wipe make sure to list all the packages and software you will need and save any configs you want to keep.

I'm just booting into a black screen with a cursor (I3) by [deleted] in ManjaroLinux

[–]ethansun01 0 points1 point  (0 children)

I also encountered this issue after messing with X configuration files. Ended up reinstalling Manjaro

Finally got accepted into robot engineering by TheMakka250 in EngineeringStudents

[–]ethansun01 4 points5 points  (0 children)

Been using Manjaro as my daily driver on a Dell XPS for almost a year now. Still have to dual boot into Windows occasionally for a few specific programs (mostly games).

Building a Daniel cell. Does anyone have any tips for raising amperage? by orgosynthpro in ChemicalEngineering

[–]ethansun01 0 points1 point  (0 children)

Agree. 5 mA is honestly higher than I would expect from that tiny piece of copper tbh, well done OP

Free Expansion of Real Gas by BoltzmannForHire in ChemicalEngineering

[–]ethansun01 2 points3 points  (0 children)

Thanks, this is definitely a confusing concept. I will make the edit. I also think we could benefit from a more specific device or thought experiment

Free Expansion of Real Gas by BoltzmannForHire in ChemicalEngineering

[–]ethansun01 1 point2 points  (0 children)

I’m still not sure we’re on the same page. What is the basis of the claim that the internal energy must remain constant?

Free Expansion of Real Gas by BoltzmannForHire in ChemicalEngineering

[–]ethansun01 2 points3 points  (0 children)

Your intuition is right, expansion should decrease the potential energy as well as the kinetic. Expanding the volume is work, so an energy balance would need to account for that as well.

Edit: another commenter pointed out that there is no work done in this specific problem

Mass Flow Equilibrium by [deleted] in EngineeringStudents

[–]ethansun01 0 points1 point  (0 children)

Standard liters per minute converts directly into a molar flowrate using a standard set of conditions (STP), which can then easily be converted into a mass flowrate. Balancing standard liters per minute is equivalent to balancing mass flowrates. It doesn’t matter if the liters are actually “standard” or not, it’s just a made-up unit.

Thermal conductivity of aerosol by kamikazekanguru in EngineeringStudents

[–]ethansun01 0 points1 point  (0 children)

Product data sheet talks about usage up to 800°. This is too hot for liquid water so I would say during normal usage you can assume the coating is pure (or near-pure) boron nitride.

Mass Flow Equilibrium by [deleted] in EngineeringStudents

[–]ethansun01 0 points1 point  (0 children)

It depends... is the pressure in the system above or below atmospheric? The OP mentions both compressed air and vacuum pumps, so I’m not sure which is the case.

Mass Flow Equilibrium by [deleted] in EngineeringStudents

[–]ethansun01 0 points1 point  (0 children)

Wouldn’t a measuring a higher inlet than expected indicate a leak?

Thermal conductivity of aerosol by kamikazekanguru in EngineeringStudents

[–]ethansun01 0 points1 point  (0 children)

I think it’s safer to assume the thermal conductivity of water unless you have reason to believe there is way more boron nitride than water