Talk:Q17128025
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Autodescription — cross section (Q17128025)
description: measure of probability that a specific process will take place in a collision of two particles
- Useful links:
- View it! – Images depicting the item on Commons
- Report on constraint conformation of “cross section” claims and statements. Constraints report for items data
For help about classification, see Wikidata:Classification.
- Parent classes (classes of items which contain this one item)
- cross section (Q17128025)
- area (Q11500)
- definite integral (Q1991596)
- scalar quantity (Q181175) (†)→
- area (Q111811675)
- ISQ derived quantity (Q30337763)
- physical quantity (Q107715) (‡)→
- →(❖) geometric measure (Q123410660)
- →(‡) physical quantity (Q107715)
- area (Q11500)
- cross section (Q17128025)
- Subclasses (classes which contain special kinds of items of this class)
- ⟨
cross section⟩ on wikidata tree visualisation (external tool)(depth=1) - Generic queries for classes
- See also
- This documentation is generated using
{{Item documentation}}.
Why is cross-sectional area merged here[edit]
Seems a bit strange to merge cross-sectional area (Q29325024) "cross-sectional area" to this page, as it's subtopic of cross section (Q845080) (geometry) and not this specific article (application in physics). Is there a missing rationale that I'm overseeing? Mwtoews (talk) 10:32, 23 August 2020 (UTC)
- Hello @Mwtoews: I've seen both "cross section" and "cross-sectional area" being used as synonyms for the physical concept. I merged the two items because I could not determine what their difference is. We could un-merge them and add a better description to the non-physics item so that it is clear what exactly the difference is. Toni 001 (talk) 12:39, 23 August 2020 (UTC)
- Hi @Toni 001: I think um-merge would be appropriate with the rationale that cross section (Q845080) is a basic geometry concept and cross-sectional area (Q29325024) "cross-sectional area" is also a basic geometry concept. These geometry concepts have applications in physics (this topic) and other disciplines, such as hydrology (e.g. en:Discharge (hydrology)). Let me know if you are unable to un-merge, and I could assist. Mwtoews (talk) 21:11, 23 August 2020 (UTC)
- @Mwtoews: I restored the items to before the merge. Do you have a suggestion for a better label? I'm confused about whether item Q29325024 refers to a geometrical concept (the surface created by cutting a geometric shape), evidenced by the "subclass of cross section" statement, or a quantity (measured in m^2). Toni 001 (talk) 08:12, 24 August 2020 (UTC)
- @Toni 001: Thanks, I'll try to improve the label to help better distinguish. In my interpretation, cross section (Q845080) is a geometrical surface (i.e. surface (Q484298)) that has a quantity (area (Q11500)) described by cross-sectional area (Q29325024). Does this seem correct? Mwtoews (talk) 23:50, 25 August 2020 (UTC)
- @Mwtoews: Yes, that sounds good. Toni 001 (talk) 07:05, 26 August 2020 (UTC)
- @Toni 001: Thanks, I'll try to improve the label to help better distinguish. In my interpretation, cross section (Q845080) is a geometrical surface (i.e. surface (Q484298)) that has a quantity (area (Q11500)) described by cross-sectional area (Q29325024). Does this seem correct? Mwtoews (talk) 23:50, 25 August 2020 (UTC)
- @Mwtoews: I restored the items to before the merge. Do you have a suggestion for a better label? I'm confused about whether item Q29325024 refers to a geometrical concept (the surface created by cutting a geometric shape), evidenced by the "subclass of cross section" statement, or a quantity (measured in m^2). Toni 001 (talk) 08:12, 24 August 2020 (UTC)
- Hi @Toni 001: I think um-merge would be appropriate with the rationale that cross section (Q845080) is a basic geometry concept and cross-sectional area (Q29325024) "cross-sectional area" is also a basic geometry concept. These geometry concepts have applications in physics (this topic) and other disciplines, such as hydrology (e.g. en:Discharge (hydrology)). Let me know if you are unable to un-merge, and I could assist. Mwtoews (talk) 21:11, 23 August 2020 (UTC)
- @Mwtoews: @Toni 001: On August 21, thus shortly before the discussion above took place, KrBot made cross section (Q17128025) a generic part of cross section (Q845080) (has part(s) (P527)), thus replacing the previous value cross-sectional area (Q29325024). I suppose this is related to the issue you discussed and fixed, and now I wonder:
- Is an "area" quantity really a "part" of the object it refers to? Shouldn't it rather be a has characteristic (P1552) property? Like, the Earth has a circumference, surface, volume, mass, age and so on, but those measures are hardly parts, are they?
- Assuming the quantity can be appropriately labelled, is it the correct quantity?
- Also, I'm a bit uncertain as to what the intersection of a physical body and a mathematical plane really is. Is it a bounded surface, an image of a perfect cut, or something else? Maybe I should place that question elsewhere. --SM5POR (talk) 14:31, 27 August 2020 (UTC)