Talk:Density

message: "Osmium and iridium are the densest known elements at standard conditions for temperature and pressure but certain chemical compounds may be denser."
Which compounds are denser than Os or Ir? Or are we talking about non standard conditions?  — Preceding unsigned comment added by 200.232.235.231 (talk) 05:24, 14 June 2019 (UTC)
thread_title: Add reference or example 

message: :The following highlights current issues. Feel free to either add the issues you've identified, or to strike them as they've been resolved.
WikiProject Physics' Reviewing Cheatsheet (11:16, 8 July 2008 (UTC)
thread_title: Reviewing Cheatsheet

message: may be, Gravity is a special case of Density
the electron does not spin fast enough to merge with the nuclei of the atom, i.e. lower mass/vacuum energy momentum torque of electron to that  of the nuclei of the atom, may be because of the electron's smaller mass radius  in comparison to the atom's larger radius. when moving to a higher vacuum energy density (may be because larger mass of the nuclei accumulate larger vacuum energy vector near or on it's surface with it's own torque momentum with vacuum energy)near the nuclei of the atom: electron loses photon because it must spin faster (higher torque momentum of the electron's matter surface resistance vector and the vacuum energy vector which leads to a higher spin of the electron),noting: lower energy vacuum space energy with higher energy matter of the electron and/or the nuclei of the atom.
density= matter/vacuum energy--99.109.130.141 (talk) 03:54, 7 October 2010 (UTC)
thread_title:  Gravity is a special case of Density with two objects or more 

message: What is the relationship between Denstiy and Scratch resistance?  — Preceding unsigned comment added by 193.194.132.70 (talk) 12:04, 1 August 2014 (UTC)
thread_title:  What is the relationship between Denstiy and Scratch resistance? 

message: Correct the units in the table "Densities of various materials covering a range of values". It is support g/cm^3, not kg/m^3.
Maxralf (talk) 16:59, 4 January 2015 (UTC)
thread_title:  Semi-protected edit request on 4 January 2015 

message: The subsection for U.S. Customary Units under the Common Units heading makes conflicting statements.  It includes both lb/ft^3 and slugs/ft^3 as possible density units.  This is physically incorrect, as noted in another section, as lb/ft^3 is a term for unit weight.  Slugs/ft^3 is the only correct term in the set.
If the common usage of lb/ft^3 in place of density is to be noted, that should be NOTED in the units section so that a person does not conclude that weight/volume is the proper way to calculate density, as we know that mass/volume is the definition of density.
Please make this edit.  Thank you.  — Preceding unsigned comment added by 129.252.33.12 (talk) 21:42, 25 January 2015 (UTC)
replies: text: The mass versus weight confusion is common for the unit of "pound". Our Pound (mass) article seems pretty explicit that "lb" is a standard unit of mass (correlates with kilogram), whereas the Pound (force) defines based on it (the force of the mass at earth's gravity); the force sense is not the fundamental unit. Note that the first time the term is used as a US unit, it's called (and linked) explicitly as "Avoirdupois pound", which is by definition specifically the mass-unit not the force-unit. DMacks (talk) 04:06, 26 January 2015 (UTC)
thread_title:  Edit Request:  "Common Units" Should Show Actual Density Terms 

message: The table of approximate material densities needs to be corrected. The density units in the header are in kg/m^3 so that air is shown correctly at 1.2kg/m^3. What is then incorrect is to show water as 1kg/m^3 and I suspect a lot more of the solid materials in the table also need to be increased by 1000.  These figures have probably been taken from another table with units of g/cm^3.  For instance Gold is shown as 7.? whereas I'd expect a cubic metre of gold to be many tonnes - probably 7000 kg or so and water, not 1.0 but 1000 as it shows in an earlier table.
86.190.18.53 (talk) 17:58, 10 February 2015 (UTC)
thread_title:  Semi-protected edit request on 10 February 2015 

message: Hello fellow Wikipedians,
I have just added archive links to  on Density. Please take a moment to review my edit. If necessary, add  after the link to keep me from modifying it. Alternatively, you can add  to keep me off the page altogether. I made the following changes:
*Added archive https://web.archive.org/20100805010226/http://oilgasglossary.com:80/density.html to http://oilgasglossary.com/density.html
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Cheers. —cyberbot IITalk to my owner:Online 22:59, 25 August 2015 (UTC)
thread_title:  External links modified 

message: 206.80.31.55 (talk) 19:41, 23 September 2015 (UTC)
replies: text: Not done: it's not clear what changes you want to be made. Please mention the specific changes in a "change X to Y" format. Cannolis (talk) 19:45, 23 September 2015 (UTC)
thread_title:  Semi-protected edit request on 23 September 2015 

message: Please fix sorting of table "Others" so that Interstellar medium (kg/m3 = 10-19) is correctly sorted as smaller than the other elements of the list
Wheatbyproducts (talk) 04:31, 11 November 2015 (UTC)
thread_title:  Semi-protected edit request on 11 November 2015 

message: When we say that density is a positive scalar quantity. What do we actually mean by positive here ?  --Ankit2299 (talk) 06:58, 31 December 2015 (UTC)
replies: text: Possibly "not less than zero"? That follows logically from its definition based on mass and volume, neither of which seem like they could be negative values. DMacks (talk) 07:12, 31 December 2015 (UTC)
thread_title:  a question 

message: 195.171.207.74 (talk) 13:06, 1 December 2016 (UTC)
replies: text: Not done: it's not clear what changes you want to be made. Please mention the specific changes in a "change X to Y" format. Sunmist (talk) 13:32, 1 December 2016 (UTC)
thread_title:  Semi-protected edit request on 1 December 2016 

message: I'd like to update the value for density of seawater. There is a standard value at 25C and 35 g/kg salinity. The current value is way off. 
I'd like to update it to 1023.6 kg/m3, referring to the website: http://web.mit.edu/seawater/ and the papers:
a. K.G. Nayar, M.H. Sharqawy, L.D. Banchik, and J.H. Lienhard V, "Thermophysical properties of seawater: A review and new correlations that include pressure dependence," Desalination, Vol. 390, pp.1-24, 2016. doi:10.1016/j.desal.2016.02.024 (preprint)
b. Mostafa H. Sharqawy, John H. Lienhard V, and Syed M. Zubair, "Thermophysical properties of seawater: A review of existing correlations and data," Desalination and Water Treatment, Vol. 16, pp.354-380, April 2010. (PDF file which includes corrections through January 2016.) Betterworld123 (talk) 22:47, 24 February 2017 (UTC)
replies: text: Not done: it's not clear what changes you want to be made. Please mention the specific changes in a "change X to Y" format. -- Dane talk  21:55, 3 March 2017 (UTC)
thread_title:  Semi-protected edit request on 24 February 2017 

message: Value given in table for concrete is 2,000 kg/m3, but all other sources I have read, including Wikipedia page "Properties of Concrete", give a typical value of 2,400. Please can someone review and edit as necessary.  — Preceding unsigned comment added by 42.98.92.235 (talk) 06:32, 9 May 2017 (UTC)
replies: text: Yes, that is sourced in the lede of [concrete]]. Will adjust. - DePiep (talk) 19:16, 9 February 2018 (UTC)
thread_title:  Concrete 

message: Planck density: density of hypothetical Planck Star or central object of black hole present there instead of singularity.
https://physics.stackexchange.com/q...nificance-of-the-planck-density/243687#243687  2601:580:109:FFAD:DD87:4ADD:F44:264E (talk) 01:08, 12 February 2019 (UTC)
thread_title:  Planck Density 

message: What is the significance of density and sp gr. test in oil industry field? 185.240.17.40 (talk) 07:27, 29 March 2022 (UTC)
thread_title:  What is the significance of density and sp gr. test in oil industry field? 

message: * Osmium: 22.61g/cm3. 
* Iridium: 22.65g/cm3 
* Hassium: 41g/cm3 
Do we only include stable elements? Hassium is unstable with isotope-276 having the longest half-life of 1.1 hour. Plutonium is unstable with isotope-244 having the longest half-life of 80.8 million years. Do we include plutonium? 2600:1700:D0A0:21B0:16C:429D:E228:58EB (talk) 01:02, 16 May 2022 (UTC)
replies: text: My guess is that only includes experimentally measured densities. We don't really know enough of hassium's crystal structure. 74.135.194.87 (talk) 18:24, 17 February 2024 (UTC)
thread_title:  "Osmium and iridium are the densest known elements at standard conditions for temperature and pressure" 

message: Who got rid of the page (Orders of magnitude (density) )? 74.135.194.87 (talk) 18:25, 17 February 2024 (UTC)
thread_title:  Orders of magnitude (density)