Wikipedia:Reference desk/Archives/Science/2018 July 4

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July 4

Please ID the flower

[1] Thank you. 104.162.197.70 (talk) 02:17, 4 July 2018 (UTC)

Looks like Scadoxus multiflorus (Blood lily) although I've never seen them in blue... Abecedare (talk) 02:32, 4 July 2018 (UTC)

I'd just remark in passing that it's not entirely clear which flower the OP is asking us to identify. There appear to be at least two, and possibly as many as five, different species of flower in the picture. --Trovatore (talk) 03:58, 4 July 2018 (UTC)

SpaceX

Hi guys,

This graph should be updated to "12" for 2018. Source. Thank you, designers ;) Ericdec85 (talk) 03:15, 4 July 2018 (UTC)

You may wish to consider raising the issue with Kjerish or one of the editors who has previously updated the graph. I see no indication of which software was utilized to create the infographic on the file page and while no particular software is required, others on the articles where the graph is employed will probably prefer continuity. Snow ^{let's rap} 07:35, 4 July 2018 (UTC)

@Ericdec85: @Snow Rise: Done — Kjerish (talk) 09:57, 4 July 2018 (UTC)

Thank you Kjerish, that was very accommodating of you. :) Snow ^{let's rap} 10:01, 4 July 2018 (UTC)

Is there or was there a diseases so called "hadroken" or "hadrokan"?

In the Talmud there is a word for a disease called "הדרוקן" (there are many options how to read it: Hadroken, Hadrokan, Hydroken, Hydrokan, hedroken, hadrokan). I tried to google them but I didn't find answer. Also it makes sense that it has to do something with water or liquid (hydro prefix), I'm not sure if it's not something more specific (congestion, edema? or maybe something else which should be solved when such word will be found in the ancient times).--2A02:ED0:6D6D:F300:14FF:7A4C:A0F5:D524 (talk) 13:19, 4 July 2018 (UTC)

This was also posted at the language desk. ←Baseball Bugs ^{What's up, Doc?} carrots→ 13:24, 4 July 2018 (UTC)

Please continue at the Language Desk. Alansplodge (talk) 16:49, 4 July 2018 (UTC)

Quantum spin pairing in atomic and molecular species

I can't seem to find a relevant article to answer this question. I know that spin pairing can occur over degenerate energy levels to turn a triplet into a singlet state, but what about over non-degenerate levels of an excited state? Plasmic Physics (talk) 13:21, 4 July 2018 (UTC)

You can look at Helium_atom - there are both singlet and triplet states. Ruslik_Zero 20:22, 4 July 2018 (UTC)

So, yes? If this is true please have a look at [2]. Why is the Ath state higher in energy than the bth state if the Ath and ath states have the same configuration but multiplicities? The only way that this makes sense, is if the pi orbitals are infact higher in energy than the px+px sigma orbital. Does that mean that most of the MO diagrams on Google are wrong? i.e - is the electronic configuration: 1σ²
_g1σ²
_u2σ²
_g2σ²
_u3σ²
_g1π²
_u? Plasmic Physics (talk) 01:52, 5 July 2018 (UTC)

A and a states have the same projection of the orbital momentum on the molecular axis and the same parity but different spin. However this does not mean that their electronic configuration are similar - they can be very different. Ruslik_Zero 20:11, 5 July 2018 (UTC)

I see what the problem is. Where can I find a demonstration of how to correctly determine a term symbol from an MO diagram. I thought I have figured it out, but it seems I'm wrong. I need to understand how to determine the angular momentum projections (Λ and Ω). Plasmic Physics (talk) 08:42, 6 July 2018 (UTC)

Is there a scientific basis for the claim that carbonated water expand the stomach?

I heard that carbonated water expand the stomach because of the gases and therefore it can cause to obesity (the bigger stomach the more food). Is there a scientific basis for the claim that carbonated water expand the stomach?--2A02:ED0:6D6D:F300:14FF:7A4C:A0F5:D524 (talk) 21:56, 4 July 2018 (UTC)

That sounds Not even wrong. Bloating and obesity are two different things. Drinking carbonated water could cause bloating. Obesity is ultimately caused by consuming more Food energy than one uses (though it can be influenced by other factors). Sodas have carbonated water but usually also have a lot of sugar. Ian.thomson (talk) 22:00, 4 July 2018 (UTC)

I really don't understand your answer, obesity can also caused indirectly by stomach expansion that cause to more consumption of fats or carbs. Compare with Sleeve gastrectomy that analogically works based on this principle. --2A02:ED0:6D6D:F300:7869:435F:5ED7:13CC (talk) 00:40, 6 July 2018 (UTC)

Competitive eaters who want to stretch their stomachs to make them larger don't use carbonation. It just makes them burp. See Competitive eating#Training and preparation and [3][4][5][6] for how they do it. --Guy Macon (talk) 22:40, 4 July 2018 (UTC)