Mersenne prime

Metabolism

Piracy website

{c}
{tag=United Kingdom}
{wiki}

= £
{synonym}
{title2}

= Pound
{synonym}


Pound sterling

{disambiguate=video game}
{c}
{title2=1996}
{wiki}


Quake

Quake (video game)

String-search algorithm

{disambiguate=game engine}
{c}
{wiki}

= Unity
{c}
{synonym}


Unity

Unity (game engine)

{wiki}

* https://physics.stackexchange.com/questions/33875/gravitation-is-not-force
* https://www.quora.com/Why-is-everybody-saying-that-gravity-isnt-a-force

Related to <what does it mean that photons are force carriers for electromagnetism?>.


Why gravity is not a force?

Country in Europe

Drug tolerance

Extended Euclidean algorithm

Graphics library

Numerator

{disambiguate=Greek}
{title2=$\Psi$}
{title2=$\psi$}
{wiki}

= Psi
{synonym}

As if it weren't enough, there's also a <Cyrillic script> psi that is slightly different. Life's great.


Psi (Greek)

Search for extraterrestrial intelligence

https://physics.stackexchange.com/questions/266359/when-we-say-electron-spin-is-1-2-what-exactly-does-it-mean-1-2-of-what

More interestingly, how is that implied by the <Stern-Gerlach experiment>?

https://physics.stackexchange.com/questions/266359/when-we-say-electron-spin-is-1-2-what-exactly-does-it-mean-1-2-of-what/266371#266371 suggests that half could either mean:
* at limit of large `l` for the <Schrödinger equation solution for the hydrogen atom> the difference between each angular momentum is twice that of the eletron's spin. Not very satisfactory.
* it comes directly out of the <Dirac equation>. This is satisfactory. :-)


Why is the spin of the electron half?

{wiki}

In 2020 physics, best explained by <general relativity>.

TODO: does old Newtonian gravity give different force results than general relativity?


Ciro Santilli @cirosantilli 37