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Physics Meta

04:33

Q: What to do about this man spamming the site post which doesn't seem to be Questions but rather a show off?

Recently this person sudhakaran, also Sudhakaran, is posting his papers on the site in the name of Questions but which doesn't seem so. Rather they are (a kind of) show off. Aren't there any policies for such (as we have for Homework and Exercise type question)? Also is there any thing to stop su...

Physics Meta

04:54

Q: Are there certain times of day that are best for posting questions and Answers on Physics Stack Exchange as of late 2019?

I was wondering if there are certain times of day, and of the week that questions are most likely to get the most high quality answers on Physics Stack Exchange accounting for the questions asked, and when looking to answer questions if there are times that are most likely to have questions that ...

discussion questions site-statistics

Rudi_Birnbaum

Hi all,

when I look at IR emission spectra of the earths atmosphere I see something near the CO$_2$ vibrational Q-band looking like a "spike". What does it mean? I would expect the inverse shape of the CO$_2$ absorption spectrum.

2 hours later…

heather

06:47

i was scrolling through news and came across this article (the clickbait feels strong in this one), claiming recent work in this paper is evidence towards a fifth fundamental force. I don't know enough here - is this bs or legit?

3 hours later…

F.White

10:15

Hey there. My textbook says that atoms bond together because the compound that results is more stable and lower energy, and that the energy escapes as heat. Is it that upon the bonding of two atoms, a photon is emitted?

Slereah

10:54

morning

I just spent 4 days partying

So I could use a cup of mathematician's helper

(ie amphetamines)

Emilio Pisanty

11:10

@ZeroTheHero =) appreciated, of course

Slereah

"Christ is a nominalization formed from χρῑ́ω ‘rub, anoint’; an actual cognate of this word turns out to be ghee"

Our buttery lord

PM 2Ring

@heather Hi! There's a question on the main site:

Q: Is the "protophobic fifth force" observed in nuclear decays a new fundamental force?

There is a recent paper in PRL, also on the ArXiv that claims the discovery of a fifth force, mediated by a 17 MeV boson, which explains an anomaly in nuclear decays. Is this a real effect? Could the claimed particle be some sort of composite particle such as a pion?

particle-physics experimental-physics nuclear-physics

@Slereah :) Also see en.wikipedia.org/wiki/Chrism

Slereah

11:33

"chrism is usually olive oil"

Delicious

PM 2Ring

@Slereah Careful with that stuff youtu.be/wkUGDYjYgMs ;)

Slereah

IIRC from historical analysis, Erdos basically took amphetamines in a dose consistent with like

ADHD medication

I can understand, rly

Doing math with ADHD ain't easy

The 70 unfinished articles on my site can attest

home.uevora.pt/~rpa/GwistorSpaceRuiAlbuquerque.pdf

The hell is a gwistor

PM 2Ring

11:53

@Slereah Probably. I read The Man Who Loved Only Numbers about 15 years ago. Erdős self-medicated with amphetamines and lots of coffee. When he was young, various amphetamines were legally available, even without prescription. In the US, they weren't controlled until the late 50s, and were still easy to obtain legally into the 70s.

Slereah

12:10

"History tells us that the Khan’s advisors were so concerned about his drinking that they staged a sort of medieval Mongolian intervention, begging him to cut down. Ogedei was moved by their plea, and swore to limit himself to one cup of alcohol a day from then on. But he later regretted his pledge and ordered the imperial artisans to create a purpose-made giant cup that could hold as much alcohol as he wanted."

PM 2Ring

13:08

@F.White Sometimes photons are emitted, but the energy can also be released as kinetic energy, vibrating or moving the molecules. And some reactions are endothermic.

Physics Meta

13:33

Q: Are Questions about Unrealistic Physics Off Topic?

A few days ago a question was asked about how close one could safely approach a small non-radiating black hole. A comment was made that "Micro black holes do evaporate, so this question is fictional physics and off-topic". However, there are many highly upvoted questions on the site about non-r...

discussion

2 hours later…

Abhas Kumar Sinha

15:10

- sources (Ancient Alien, History TV 18)

@Slereah I <3 Genghis Khan

He was actually an alien sent to earth

Slereah

That was Ogedei Khan

Abhas Kumar Sinha

sources - (Ancient Aliens, History TV 18)

@Slereah seems his brother

Slereah

Son, actually

Abhas Kumar Sinha

@Slereah your son? cool name

Slereah

Well I am Genghis Khan, after all

Abhas Kumar Sinha

15:12

@Slereah You are an alien sent to earth na? I know you

@Slereah Do you know where you died? (That place is still a secret) also, I heard from mongolian people that your hair was pink and skin was blue

[] [] []

@Slereah proof : disclose.tv/ancient-aliens-the-shamans-302432

dandide

16:13

Hi I read this question on math.stackexchange, it looks like something related to the KPZ equation, I read about the Källén–Lehmann representation but couldn't work out how to use it here (if it helps), so I was wondering if someone could be interested to give an answer or provide some hint about it, thanks

Abhas Kumar Sinha

17:00

@Slereah @EmilioPisanty I've a problem with QM. If $ i\hbar \nabla_x $ is the operator for momentum, then $KE = 1/2m \times p^2$? so, $$ K.E. = 1/2m \alpha^2 $$ where $$ \alpha\psi = i\hbar \nabla_x \psi $$

But it's $$ KE =(1/2m) \hat p^2 _x \nabla^2_x \psi$$

ACuriousMind

17:48

@AbhasKumarSinha Where did that formula come from?

Kyle Kanos

My wife gave birth this morning (EST zone). So I’m a dad again.

ACuriousMind

@KyleKanos Congrats! (again)

Kyle Kanos

@ACuriousMind Thanks!

PM 2Ring

18:25

Congrats, KK!

rob

19:02

@KyleKanos Congratulations, Kyle!

Kyle Kanos

Thanks @PM2Ring & @rob

heather

@PM2Ring thanks!

@KyleKanos Congratulations!

Kyle Kanos

19:22

@heather thanks!

3 hours later…

Physics Meta

22:13

Q: what exactly does "near complete" mean?

One of my answers to an "homework and exercise" question was deleted on the ground of being "near complete". In fact, knowing I was not supposed to give a complete answer, I was careful not to solve the problem to the end. The concept of "near complete" is a bit "fuzzy", isn't it ?

discussion

Emilio Pisanty

@AbhasKumarSinha what? That's nowhere near correct.

@KyleKanos congratulations!!!

enumaris

@ACuriousMind So, I'll actually be in Walldorf in January to attend the Hasso Plattner award stuff... we should meet up and chat a bit? I'll finally get to meet the famous ACM. XD

ACuriousMind

@enumaris Neat! Remind me a bit closer to the date and we'll figure something out. Are you nominated or just attending?

Kyle Kanos

23:15

@EmilioPisanty thanks!

enumaris

23:29

@ACuriousMind I am nominated XD I will remind you closer to January

I went to Seattle last week to participate in filming a commercial for our project...wonder if that's up somewhere yet...

ACuriousMind

@enumaris Congrats! I'll look for the commercials ;)

enumaris