Talk:2589: Outlet Denier

2022-03-04T23:36:40Z

Raldi: Moved someone else's comment to a new section

== undersde ==

A missing i in the title text
[[User:While False|While False]] ([[User talk:While False|talk]]) 21:47, 4 March 2022 (UTC)
:It's fixed now. I'm not sure what the policy is about updating here, I think we try to keep the original in a history page. [[User:Barmar|Barmar]] ([[User talk:Barmar|talk]]) 22:46, 4 March 2022 (UTC)

== Actually exists ==

Outlet deniers are a real thing. For example, the Instant Pot air fryer attachment has one of these on its plug to discourage people from using it at the same time as the main pot (which would be bad). Photo here: https://www.adventurousway.com/images/i/fzjll58c5a77/1536w/gear-reviews/instant-pot-air-fryer-lid-review/air-fryer-lid-plug.webp

== D shape? ==

Any idea what the D shape might be? Is it to deny some specific shape of power connection I'm having trouble visualizing, or simply a handle (though I also have trouble visualizing the designers of this adding such a convenient feature). [[Special:Contributions/172.70.135.78|172.70.135.78]] 23:32, 4 March 2022 (UTC)

Talk:2589: Outlet Denier

2022-03-04T23:23:31Z

Raldi: /* Actually exists */ new section

2009: Hertzsprung-Russell Diagram

2018-06-25T03:39:49Z

Raldi:

{{comic
| number = 2009
| date = June 20, 2018
| title = Hertzsprung-Russell Diagram
| image = hertzsprung_russell_diagram.png
| titletext = The Hertzsprung-Russell diagram is located in its own lower right corner, unless you're viewing it on an unusually big screen.
}}

==Explanation==
{{incomplete|Fill out the table. Do NOT delete this tag too soon.}}

The {{w|Hertzsprung–Russell diagram}} is a scatterplot showing absolute luminosities of stars against its effective temperature or color. It's generally used to understand a star's age.

The axes are labeled in {{w|Kelvin}} (degrees {{w|Celsius}} above {{w|absolute zero}}) for {{w|effective temperature}} and, unlike many Hertzsprung–Russell diagrams, {{w|Watts}} for {{w|luminosity}}. While most Hertzsprung–Russell diagrams are labelled in units of {{w|solar luminosity}} or {{w|absolute magnitude}}, all three are perfectly valid measures of {{w|luminosity}}, which refers to the total power emitted by the star (or other body). {{w|Effective temperature}} refers to temperature of a blackbody with the same surface area and luminosity. This is meant to provide an estimate of the surface temperature of the object.

Regular Hertzsprung–Russell diagrams cover ranges of about 1,000K to 30,000K, and what is labeled on this diagram as 1021 to 1033 watts—i.e. the upper-left corner. Extended diagrams increase the luminosity range only to include the "Brown Dwarfs". This diagram has been extended to much lower magnitudes on both axes. The joke comes from the absurdity of a diagram meant for stars including much smaller objects, such as planets ... and astronomers.

Though not included in the diagram, the title text notes that the screen displaying the diagram would probably be plotted somewhere in the lower right corner due to its (relatively) low brightness and heat output. Bigger screens have a higher total output (in terms of luminosity) and are thus positioned further towards the diagram's top. An "unusually big screen" would have to be something like a JumboTron or a projector for its luminosity or temperature to put it outside of the lower right corner.

==Table==

{| class="wikitable"
!style="width:10%"|Item
!style="width:10%"|Effective Temperature
!style="width:10%"|Luminosity
!style="width:70%"|Explanation
|-
|{{w|Betelgeuse}}
|3200 K
|1.6 * 1031 W
|
|-
|{{w|Vega}}
|10,000 K
|1.8 * 1028 W
|
|-
|{{w|Sun}}
|5800 K
|3.6 * 1026 W
|
|-
|{{w|Proxima Centauri}}
|2700 K
|2.0 * 1023 W
|
|-
|{{w|HD 189733 b}}
|2100 K
|4.8 * 1021 W
|
|-
|Interior of a {{w|Thermonuclear weapon|hydrogen bomb}} during detonation
|~108 K
|~1020 W
|
|-
|{{w|Jupiter}}
|285 K
|1.2 * 1018 W
|
|-
|{{w|Venus}}
|330 K
|5.0 * 1017 W
|It appears that this might have been misplaced on the temperature axis, being far too closely placed to France and to Earth. In fact Venus is at 735K where Earth has a mean of 287K.
|-
|{{w|Earth}}
|300 K
|3.0 * 1017 W
|
|-
|{{w|Mars}}
|255 K
|2.0 * 1016 W
|
|-
|{{w|Moon}}
|300 K
|1.2 * 1016 W
|
|-
|Nuclear Fireball
|8000 K
|2.0 * 1014 W
|
|-
|{{w|France}}
|300 K
|2.0 * 1014 W
|This is part of Earth (and more precisely a part of Europe), the same temperature as Earth, but less luminous in proportion to its surface area. Including this may be a joke referencing the two possible meanings of ‘Europa’ (see the next entry). [https://goo.gl/images/H8Dmu3 France emits less light at night than neighbouring countries], perhaps due to lower population density.
|-
|{{w|Europa (moon)|Europa}}
|90 K
|3.5 * 1014 W
|While this term could refer to Europe (a part of Earth, of which France (the previous entry) is a further part), the temperature and luminosity are both too small for that, so it must refer to the moon of Jupiter instead.
|-
|Lightning Bolt
|30,000 K
|30 GW
|
|-
|{{w|Ivanpah Solar Power Facility|Ivanpah Solar Plant}} Salt Tank
|1200 K
|1.2 GW
|The [[wikipedia:Ivanpah_Solar_Power_Facility|Ivanpah Solar Power Facility]] is a large solar power generator in the Californian Mojave desert. It concentrates sunlight from 173,500 reflectors onto three water-boiler towers. Randall appears to have mistakenly confused this power plant with the nearby Crescent Dunes, which uses tanks of molten salt to store energy. https://insideclimatenews.org/news/16012018/csp-concentrated-solar-molten-salt-storage-24-hour-renewable-energy-crescent-dunes-nevada
|-
|Medium-sized Lava Lake
|800 K
|32 MW
|
|-
|Cruise Ship
|325 K
|30 MW
|
|-
|Campfire
|870 K
|7.0 kW
|
|-
|{{w|Blue whale}}
|280 K
|78 kW
|Must be average surface temperature as whales are warm-blooded @ ~100F/37C internally, interestingly this and the cruise ship may be the only entries where a significant amount of power produced is conducted away rather than radiated. Also the power seems high compared to what I can find. [https://www.researchgate.net/publication/321972840/figure/fig1/AS:574004013604864@1513864629274/Visible-and-infrared-spectrum-images-of-various-humpback-whale-surfacing-features.png These images] suggest a surface temperature around 295K - 300K for a Humpback whale when surfacing
|-
|{{w|Arc lamp}}
|65,000 K
|150 W
|
|-
|Lightbulb
|4800 K
|75 W
|The temperature value here refers to colour temperature, which for an incandescent bulb is the same as the filament temperature. However tungsten filament lights, commonly referred to as "bulbs", have a colour temperature of between 2400 and 3600 K.
|-
|LED Bulb
|5800 K
|8 W
|The temperature value here refers to colour temperature, not physical temperature. Color temperature is a better match to effective temperature than physical temperature.
|-
|Astronomer
|310 K
|100 W
| The body temperature of a human (astronomer or otherwise) is about 310K (37°C). Skin Surface Temperature (which would fit the meaning of effective temperature better) is typically 31°C - 35°C. An astronomer standing outside in a thick coat on a cold night would have a much lower surface temperature.

A human being generating 100W for 24 hours needs 2065 kcal or 8,64 MJ. According to the UN FAO this is e.g. the typical daily energy output of women with weight 55kg between 18 and 59 years having a light activity lifestyle of 1.55xBMR (basic metabolic rate).

|}

==Transcript==
{{incomplete transcript|Do NOT delete this tag too soon.}}
:Expanded Hertzsprung-Russell Diagram
:[A scatter plot is shown, with the x-axis labeled Effective Temperature (in kelvins), and the y-axis Luminosity (watts).]
:

{{comic discussion}}

[[Category:Scatter plots]]
[[Category:Astronomy]]

explain xkcd - User contributions [en]

Talk:2589: Outlet Denier

Talk:2589: Outlet Denier

2009: Hertzsprung-Russell Diagram