Wikipedia:Reference desk/Archives/Science/2021 January 27

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January 27

What is the task in the picture?

Can anyone identify what is being done here? Icemaking? papermaking? It is probably a tourist photo taken in in Java. Thanks! HLHJ (talk) 01:10, 27 January 2021 (UTC)

Did you ask the uploader? ←Baseball Bugs ^{What's up, Doc?} carrots→ 01:27, 27 January 2021 (UTC)

Could be gutta-percha, or rubber, or some kind of latex production. Abductive (reasoning) 02:25, 27 January 2021 (UTC)

The uploader is not around and sometimes even mislabelled the country, unfortunately. Elastomer production! That's interesting and seems plausible, Java does export it. HLHJ (talk) 04:52, 27 January 2021 (UTC)

She seems to be removing galvanized or aluminium partitions between areas of white, milky liquid. HLHJ (talk) 04:53, 27 January 2021 (UTC)

Looks like a coagulating trough, see Crepe rubber for similar photos and the process. Mike Turnbull (talk) 10:29, 27 January 2021 (UTC)

Thank you, Mike Turnbull and Abductive! That really does look like the photo. I will categorize accordingly. I am slightly alarmed that the latex workers in the photos on Commons seem not to wear gloves. I'd think that would lead to a very high rate of latex allergies (hmm, that article says about ten percent of them become allergic). HLHJ (talk) 00:32, 28 January 2021 (UTC)

If you’re clarifying titles and descriptions, the same creator also has an image called File:Eating_children_in_Nepal.jpg.—Amble (talk) 15:32, 30 January 2021 (UTC)

Frozen food? As HLHJ indicated, the uploader is not available, having last edited 6 1/2 years ago. Presumably there's a way to rename a picture, e.g. to "Children eating in Nepal". ←Baseball Bugs ^{What's up, Doc?} carrots→ 17:09, 30 January 2021 (UTC)

I don't seem to be able to directly move files on Wikimedia Commons, but I submitted a request. --Amble (talk) 20:43, 30 January 2021 (UTC)

Which is more massive, a quasar or a quark star?

I don't see either quasar or quark star on Orders of magnitude (mass). 97.125.232.133 (talk) 01:10, 27 January 2021 (UTC)

A quasar (as is mentioned in that article's first sentence) is an active galactic nucleus which includes a black hole that has a mass millions to billions of times that of a typical star (such as the Sun). A quark star may (rarely) be formed from the end-of-life collapse of a single star that, though having more mass than average, is still less massive than the larger stars which instead form stellar-mass black holes when they collapse. {The poster formerly known as 87.81.230.195} 90.200.40.9 (talk) 05:04, 27 January 2021 (UTC)

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[Not sure how to relocate these references which have strayed from an earlier query above. {The poster formerly known as 87.81.230.195} 90.200.40.9 (talk) 05:06, 27 January 2021 (UTC)]

Fixed. The trick is to add {{reflist-talk}} at the bottom of the earlier query. And then for other people contributing to the thread to add their new content above that line... --142.112.149.107 (talk) 08:21, 27 January 2021 (UTC)

Or below, while adding another {{reflist-talk}} below their comments if they contain new <ref>...</ref>s. Their numbering will then start afresh at [1], though.  --Lambiam 10:17, 27 January 2021 (UTC)

Apologies, I missed that. Thank you for fixing. HLHJ (talk) 01:10, 28 January 2021 (UTC)