Editing 2967: Matter

{{comic
| number    = 2967
| date      = August 2, 2024
| title     = Matter
| image     = matter_2x.png
| imagesize = 234x341px
| noexpand  = true
| titletext = He was the first person to land a 900, which is especially impressive because pulling off a half-integer spin requires obeying Fermi-Dirac statistics.
}}

==Explanation==
{{incomplete|Created by a GOOFY FRONTSIDE WIKI GRIND TO SECRET PHYSICS DEMO TAPE - Please change this comment when editing this page. Do NOT delete this tag too soon.}}

In {{w|skateboarding}}, the term 'goofy' means to push with the left foot, using the {{w|Footedness#Goofy_stance|opposite stance}} to standard footing, a stance pushing with one's right foot. The comic uses this as a analogy for {{w|antimatter}} in particle physics, which exhibits the opposite charge to ordinary matter and will destroy both upon collision, releasing energy proportional to their combined mass in a process called annihilation. {{w|Tony Hawk}}, a professional skateboarder of great renown, has apparently obtained a professorship and is teaching this very non-standard theory. Professor Hawk's appearance could be a play on the name of {{w|Stephen Hawking}}, a famous astrophysicist and professor at the University of Cambridge before his death in 2018. As Tony Hawk does not have a degree in physics, teaching inaccurate lessons would be a likely pitfall of his professorship.

This analogy also indirectly raises the problem of {{w|baryon asymmetry}}, in which ordinary matter appears to be much more common than antimatter, unlike most{{citation needed}} distributions of handedness, chemical {{w|chirality}}, or the {{w|skewness}} of {{w|Multimodal_distribution|bimodal statistics}} describing asymmetries in nature (called {{w|homochirality}}, e.g., organ shape and centering, or plants favoring one branch over the other at a fork) and in artificial methods, because 'goofy-footed' skateboarders are about common as those using standard footing.

The title text describes Hawk as the first person to "land a 900," meaning the successful completion of a {{w|900 (skateboarding)|skateboarding trick}} involving two and a half rotations, or nine hundred degrees (2.5 × 360° = 900°). In physics, {{w|Spin (physics)|spin}} is a {{w|quantum number}} describing subatomic particles, named for the vaguely analogous ''but crucially distinct'' concept of {{w|angular momentum}} in classical physics. Obeying {{w|Fermi–Dirac statistics}} requires that the particles involved are {{w|fermion}}s, which include all of the electrons, protons, and neutrons comprising the entirety of Hawk's mass and electrochemical state. Fermions all have {{w|half-integer}} (i.e., ...–1½, –½, ½, 1½...) {{w|spin quantum number}}s which do indeed include 2½. However, it's very important to remember that [https://www.youtube.com/watch?v=pYeRS5a3HbE&ab_channel=ScienceClicEnglish quantum mechanical spin is ''not'' rotation, but how quickly the corresponding particle changes state when rotated.]

Whilst everyone and most everything we ordinarily interact with (except light, cosmic rays) and their decay products) are comprised entirely of fermions, {{w|Boson#Composite bosons|any composite particle made of an even number of fermions}} (including entire atoms, and their nuclei), are not fermions but {{w|boson}}s, which do ''not'' obey Fermi–Dirac statistics. Luckily, landing a 900 does not actually require complete obedience to Fermi–Dirac statistics, because a skateboarder comprised entirely of bosonic atoms would still have fermionic electrons in the orbitals of those atoms, and thus would still obey the far more macroscopically fundamental {{w|Pauli exclusion principle}}, which gives mostly empty atoms the property of substance, allowing you to hold things, walk, make sound waves with your voice, employ any mechanical property of matter and allowing a sufficiently skilled skateboarder to land a 900.

==Transcript==
{{incomplete transcript|Do NOT delete this tag too soon.}}
:[Tony Hawk (drawn with short hair) gesturing at a narrow whiteboard on which illegible things are marked, what may be a Feynman diagram with one of the particle/antiparticle pair going into a circle (possibly representing a black hole, and thus depicting the popularized(incorrect) analogy for {{w|Hawking radiation}}), and at the bottom, a 2x3 table of values.]
:Tony Hawk: In the standard model, regular matter will annihilate if it comes in contact with oppositely-charged ''goofy'' matter.

:[Caption below the panel:]
:Tony Hawk becomes a physics professor

{{comic discussion}}

[[Category:Comics featuring real people]]
[[Category:Physics]]
[[Category:Statistics]]