Difference between revisions of "265: Choices: Part 2"

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==Explanation==
 
==Explanation==
This is a little sidetrack from the "Choices" narrative. [[Cueball]] is studying {{w|special relativity}}. The {{w|speed of light}} in vacuum (299,792,458&nbsp;m/s) is denoted ''c''. [[Megan]] and the spaceship are shown traveling at 0.2''c'' in opposite directions. This would mean (in Newtonian mechanics) 0.4''c'' relatively to them. But due to relativistic effects, their velocities do not simply add when the spaceship observes Megan, in reality both would measure only 0.385''c'' ( = (u + v)/(1 + uv/c<sup>2</sup>). ) from the other's point of view. Also, {{w|time dilation}} influences the way time is observed with reference to the two frames of reference. Megan, however, has other concerns.
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The "Choices" series was released on 5 consecutive days (Monday-Friday). It explores and marvels at human freedom. This is, however, a little sidetrack from the "Choices" narrative. [[Cueball]] is studying {{w|special relativity}}. The {{w|speed of light}} in a vacuum (299,792,458&nbsp;m/s) is denoted as ''c''. [[Megan]] and the spaceship are shown traveling at 0.2''c'' in opposite directions. This would mean (in Newtonian mechanics) 0.4''c'' relative to each other. But due to relativistic effects, their velocities do not simply add when the spaceship observes Megan; in reality, both would measure only 0.385''c'' ( = (u + v)/(1 + uv/c<sup>2</sup>) ) from the other's point of view. Also, {{w|time dilation}} influences the way time is observed with reference to the two frames of reference. Megan, however, has other concerns. (This text and part of the image were completely reused in the [[1350#Space|space part]] of the interactive [[1350: Lorenz]] (see image [http://www.explainxkcd.com/wiki/index.php/File:lorenz_-_rocket_16.png here]).
  
In the title text Megan thinks about writing about this after-worldly place in Wikipedia, but then realizes that the content would be removed, due to the {{w|Wikipedia:No original research|Wikipedia policy on original research}}. Even though her claims would be true, she would need reliable written sources to support them.
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In the title text, Megan thinks about writing about this after-worldly place in Wikipedia, but then realizes that the content would be removed, due to the {{w|Wikipedia:No original research|Wikipedia policy on original research}}. Even though her claims would be true, she would need reliable written sources to support them.
  
 
All parts of "[[:Category:Choices|Choices]]":
 
All parts of "[[:Category:Choices|Choices]]":
 
*[[264: Choices: Part 1]]
 
*[[264: Choices: Part 1]]
*265: Choices: Part 2 (this one)
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*[[265: Choices: Part 2]]
 
*[[266: Choices: Part 3]]
 
*[[266: Choices: Part 3]]
 
*[[267: Choices: Part 4]]
 
*[[267: Choices: Part 4]]
 
*[[268: Choices: Part 5]]
 
*[[268: Choices: Part 5]]
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As this was the second in the series, it was released on a Tuesday.
  
 
==Transcript==
 
==Transcript==
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{{comic discussion}}
 
{{comic discussion}}
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[[Category:Comics with color]]
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[[Category:Choices]]
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[[Category:Comics sharing name|Choices]]
 
[[Category:Comics featuring Cueball]]
 
[[Category:Comics featuring Cueball]]
 
[[Category:Comics featuring Megan]]
 
[[Category:Comics featuring Megan]]
[[Category:Comics with color]]
 
[[Category:Choices]]
 
 
[[Category:Physics]]
 
[[Category:Physics]]
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[[Category:Space]]
 
[[Category:Wikipedia]]
 
[[Category:Wikipedia]]

Revision as of 20:56, 14 November 2017

Choices: Part 2
Maybe someday I'll get to write the Wikipedia article about this place! Wait, damn, original research.
Title text: Maybe someday I'll get to write the Wikipedia article about this place! Wait, damn, original research.

Explanation

The "Choices" series was released on 5 consecutive days (Monday-Friday). It explores and marvels at human freedom. This is, however, a little sidetrack from the "Choices" narrative. Cueball is studying special relativity. The speed of light in a vacuum (299,792,458 m/s) is denoted as c. Megan and the spaceship are shown traveling at 0.2c in opposite directions. This would mean (in Newtonian mechanics) 0.4c relative to each other. But due to relativistic effects, their velocities do not simply add when the spaceship observes Megan; in reality, both would measure only 0.385c ( = (u + v)/(1 + uv/c2) ) from the other's point of view. Also, time dilation influences the way time is observed with reference to the two frames of reference. Megan, however, has other concerns. (This text and part of the image were completely reused in the space part of the interactive 1350: Lorenz (see image here).

In the title text, Megan thinks about writing about this after-worldly place in Wikipedia, but then realizes that the content would be removed, due to the Wikipedia policy on original research. Even though her claims would be true, she would need reliable written sources to support them.

All parts of "Choices":

As this was the second in the series, it was released on a Tuesday.

Transcript

[Cueball is doing some exercises in a book. The clock on the wall says 12:50.]
Chapter 15: Special Relativity
Problem 1:
Two spacecraft transmit messages to each other while passing at constant velocities of...
Cueball: sigh
Meanwhile:
[Megan in a bubble and a spacecraft are moving towards each other. Each one has a velocity vector drawn before themselves, each showing a velocity of 0.2c.]
[They pass each other.]
Spacecraft: We observe your speed to be 38.5%c, and your time is passing at 92.3% the rate of ours. Does this mirror your observations?
Megan: Please help me. I think I'm lost.
[They continue with the same velocity vectors. Megan is looking back at the spacecraft.]


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Discussion

Created the "Choices: Part 3" page (its a bit of a fail), Please link it to here. 121.54.48.38 02:11, 14 May 2013 (UTC)