#Physics
Some channels i watch are a bit of a acquired taste. No need to explain further really. But anyways...
AgentJayZ again kills it with a very interesting video for all tech and physics nerds out there.
Can you restart a turbine, turbojet or turbofan (most likely) engine without any auxiliary power besides onboard batteries and maybe a bit of electricity from the Ram Air Turbine which bigger jets use in case of a emergency?
**spoilers start here**
What does that mean? Imagine, you're in a jet somehow. And not only both engines quit, but you're actually unable to start the APU (Auxillary Power Unit, it's own tiny turbine-generator). So you got no real options left but use the windmilling of your turbine to get it up to speeds where you can inject fuel and actually start it.
Tl;dr: This scenario is _EXTREMELY_ unlikely, just on the grounds that usually no engine quits for no reason.. But if you are there.
Well, it's not good ..... but _might_ just be possible.... Most probably killing the engine along the way. (You will necessarily overheat it in the process and shorten it's lifetime massively. ;))
O.k. sorry, enough technobabble.
**spoilers end**
youtu.be/SVumN6qzWCc
redirect.invidious.io/watch?v=…
inv.citw.lgbt/watch?v=SVumN6qz…
If you like to skip the rambling at the beginning and 3 other questions and outright start with the main topic, use these links:
youtube.com/watch?v=SVumN6qzWC…
redirect.invidious.io/watch?v=…
(Starting at minute 8:51 ;))
#AgentJayZ #Youtube #Invidious #Turbine #Engine #EngineOut #TurboJet #TurboFan #Aviation #Physics #Engineering #Emergency #APU #RandomShit ;)
Demonstation of the FODO alternating gradient focussing lattice (for particle beams) using lasers and lenses:
[photo] #physics #accelerators
RT https://twitter.com/MasashiJSHIRAKA/status/1705485669068612039
![- I like them thicc af - But Sir Newton, we can't write that! - Then write this: The greater the mass, the greater the force of attraction. [Porträt des Isaac Newton - Godfrey Kneller 1689]](https://s3.eu-central-2.wasabisys.com/mastodonworld/cache/media_attachments/files/111/115/852/843/673/301/small/7da5371c3a933b24.png)
Fantastic interview about Sabine Hossenfelder
I think the field of somewhat between niche and mainstream realm of physics and maths communicators in YouTube, ought to be more well known!!
https://text.npr.org/1199469798
#physics #maths #math #science #youtube #cosmology #astronomy
Whats your favorite part of the nuclear triad?
In 1814, Joseph von Fraunhofer discovered that each element produces different spectral lines. #Poetry #Science #History #Chemistry #Physics #Spectroscope #Fraunhofer (https://sharpgiving.com/thebookofscience/items/p1814.html)
Theoretical physicist/YouTuber Sabine Hossenfelder
She got famous on YouTube. Now it helps fund her research in quantum gravity
https://www.npr.org/2023/09/23/1199469798/youtube-star-scientist-sabine-hossenfelder
@skdh
Sabine Hossenfelder: https://en.wikipedia.org/wiki/Sabine_Hossenfelder
* Frankfurt Institute for Advanced Studies
* theoretical physicist, mathematician
* German professional YouTuber, theoretical physicist, science communicator, author, musician, singer
Comment: awesome videos 👍️ 🔭
#SabineHossenfelder #STEM #physics #influencers #WomenInScience #ScienceEducation
Here is a bit #workflow footage in #unity and #three.
Funcionality is mainly all builtin Needle Engine with #physics, #animation #audio etc + a firstpersoncontroller script from our samples and a little extra script to apply forces to the clicked Rigidbody
I was just in a hurry so it is really not *the* best material 😅 but it was fun and I'm happy with the result given the small time investment
Pressure paradox demonstrated by a balloon and a CD
https://youtu.be/iwmUFhomErs
The same flow of air escaping the balloon creates a higher and a lower air pressure
🔥WILL HUMANS REALIZE TRUTH IN PLAIN SIGHT?🔥
🛸THE REAL WARP DRIVE REACTOR
👽JOURNAL ARTICLES
http://osti.gov/biblio/1987612
http://doi.org/10.48550/arXiv.2306.06133
👾VIDEO PRESENTATION
http://youtube.com/live/95i9m5B2NFY?feature=share
#UFOtwitter #UFOlogy #WarpDrive #Wormhole #TimeTravel #ufoX #uapX #UAP #Physics #Engineering
New #physics video - an EVEN BETTER bouncing ball model in #python. Now with more springs.
https://youtu.be/di8s6yXo_LA
For someone passionate about #physics , #generalrelativity #GR , and #onepunchman #opm , the cover of the last chapter is just fantastic!
Bending Light to Fit Technology https://hackaday.com/2023/09/22/bending-light-to-fit-technology/ #photovoltaics #electronband #solarenergy #solarpanel #electron #Science #physics #energy #photon #color #light
Bending Light to Fit Technology - Solar power is an excellent way of generating electricity, whether that’s for an o... - https://hackaday.com/2023/09/22/bending-light-to-fit-technology/ #photovoltaics #electronband #solarenergy #solarpanel #electron #science #physics #energy #photon #color #light
Cockroft-Walton high voltage source for an accelerator
[photo] #physics #accelerators
RT https://twitter.com/ChihiroMacavity/status/1705375918586487262
@dpnash Hi David! I didn't see any obvious bump around the bananas (which make neutrinos, according to #FermiLab 's #EvenBananas #youtube) or kitty litter (sometimes famously radioactive) , but I'll have to check out fertilizer and salt substitute. #science #radioactivity #physics
A Plot of All Objects:
https://pubs.aip.org/aapt/ajp/article/91/10/819/2911822/All-objects-and-some-questions Dr. Lineweaver has woven quite the line!
#datavis #science #physics #scicomm
Is it easy for you to play? I like it, it shows how good your logic is 🧐
»Rush Hour - Online Play«
🚗 https://www.thinkfun.com/rush-hour-online-play/
--
#game #logic #gameforkids #physics #online #onlineplay #cars #game #know
Lunchtime #Physics question that I thought of last night. I don’t know anything about anything so I don’t even know if this is a meaningful question.
Hawking radiation seems (to me) to convert virtual particles to real radiation. Is that the case and, if so, could that be a source of dark energy?
(Again, I don’t even know if this is a meaningful question and, if it is, I’m sure I’m not the first to ask it.)
📣 Job alert 📣
Postdoc positions in Gravitational-Wave Physics and Astrophysics at the @mpi_grav in Potsdam.
ℹ️ https://www.aei.mpg.de/1079838/acr-postdoc-2024
🗓️ apply by November 22, 2023
Good question on one of my latest articles which lead me to a bit math and expand on when tire rolling resistance trumps cda for that specific case:
#bikenerdery #physics #aero #bike #cycling #knowledgemakesfast
@mastobikes
Uneven Gravity Makes You Weigh More in Illinois Than in Indiana
Students like to take photos of everything in #physics class. I tell them it's better to DO something wrong than to SEE something right.
https://www.instagram.com/p/CxdfuQZO7Zq/
A #song of ice, fire and jelly – exploring the #physics and #history of the #trumpet
https://aeon.co/videos/a-song-of-ice-fire-and-jelly-exploring-the-physics-and-history-of-the-trumpet
Scientists finally detect oxygen-28. Its instability suggests something is wrong with the strong nuclear force #science #physics #STEM https://www.sciencenews.org/article/oxygen-28-instability-surprise-physics
New #openaccess publication #SciPost #Physics
On weak ergodicity breaking in mean-field spin glasses
Giampaolo Folena, Francesco Zamponi
SciPost Phys. 15, 109
https://scipost.org/SciPostPhys.15.3.109
Observational Evidence for Cosmological Coupling of Black Holes and its Implications for an Astrophysical Source of Dark Energy https://doi.org/10.3847/2041-8213/acb704 via @AAS_Publishing
New #openaccess publication #SciPost #Physics
Attenuating dynamics of strongly interacting fermionic superfluids in SYK solvable models
Tian-Gang Zhou, Pengfei Zhang
SciPost Phys. 15, 108 (2023)
https://scipost.org/SciPostPhys.15.3.108
New #openaccess publication #SciPost #Physics
Unweighting multijet event generation using factorisation-aware neural networks
Timo Janßen, Daniel Maître, Steffen Schumann, Frank Siegert, Henry Truong
SciPost Phys. 15, 107 (2023)
https://scipost.org/SciPostPhys.15.3.107
July 18, 1992: The First Photo Uploaded to the Web, of CERN’s All-Girl Science Rock Band "Les Horribles Cernettes" ("The Horrible CERN Girls" in English)
The group sang love songs about colliders, quarks, liquid nitrogen, microwaves, and antimatter in ’60s-inspired outfits.
(the article contains the songs and funny lyrics, it's not that bad! 😀 )
https://www.themarginalian.org/2014/07/18/les-horribles-cernettes/
#CERN #worldwideweb #internet #music #science #geek #physics #collider #womenintech
Albert Einstein kept a picture of Faraday on his study wall, alongside pictures of Arthur Schopenhauer and James Clerk Maxwell.
Physicist Ernest Rutherford stated, "When we consider the magnitude and extent of his discoveries and their influence on the progress of science and of industry, there is no honour too great to pay to the memory of Faraday, one of the greatest scientific discoverers of all time."via @wikipedia
Michael Faraday was born #OTD in 1791. English scientist who contributed to the study of electromagnetism and electrochemistry. His main discoveries include the principles underlying electromagnetic induction, diamagnetism and electrolysis. As a chemist, he discovered benzene, investigated the clathrate hydrate of chlorine, invented an early form of the Bunsen burner and the system of oxidation numbers. via @wikipedia
Michael Faraday at PG:
https://www.gutenberg.org/ebooks/author/5541
For those who missed it, Paul Fenwick @pjf has solved the "USB paradox", where you have to try to insert a USB-A plug three times, flipping it over twice, before you succeed in inserting it into the port.
His genius, and obviously correct, explanation is that USB-A plugs have spin 1/2. Consult your local particle physicist for details if interested.
Additional model possibilities are interesting here.
A look at Poisson flow #generative models, a physics-inspired alternative to diffusion-based AI models that can create same quality images 10 to 20 times faster.
https://www.quantamagazine.org/new-physics-inspired-generative-ai-exceeds-expectations-20230919/
📣 Job alert 📣
Postdoc position: novel interferometric sensing techniques and seismic noise mitigation in a torsion balance at the @mpi_grav in Hannover.
🗓️ apply by September 30, 2023
Coronal mass ejections can damage satellites, disrupt communication, and even knock out power grids on Earth.
The Parker Solar Probe captured imagery of the September 5, 2022 solar storm sweeping up space dust as it went. #science #tech #physics https://blogs.nasa.gov/parkersolarprobe/
Gaspard-Gustave de Coriolis died #OTD in 1843.
He is best known for his work on the supplementary forces that are detected in a rotating frame of reference, leading to the Coriolis effect. He was the first to apply the term travail (translated as "work") for the transfer of energy by a force acting through a distance, and he prefixed the factor ½ to Leibniz's concept of vis viva, thus specifying today's kinetic energy. via @wikipedia
Now that is interesting..
Groundbreaking research shows that the limits of nuclear stability change in stellar environments where temperatures reach billions of degrees Celsius https://www.sciencedaily.com/releases/2023/09/230918105125.htm
Upgraded Stanford Linear Accelerator requires coldest temperatures in universe to function
Very cool — literally! 😆
My icon is 3D & explorable on any device:
https://www.olenashmahalo.com/project/observer
—
#MastoArt #sciart #3Dart #b3d #zbrush #realtime #illustration #astronomy #physics #astophysics #witch
The unexplained cause of the slowed growth of the cosmic web that connects galaxies could hint at new physics.
https://www.vice.com/en/article/4a3q5j/something-mysterious-appears-to-be-suppressing-the-universes-growth-scientists-say
#tech-science #Space #universe #physics #newphysics #astronomy #cosmicweb #Abstract
"We've Been Misreading a Major Law of Physics For The Past 300 Years"
F=MA, Newtons's second law, should be Newtons's first law IMHO.
The 2nd law of force governs ALL movement.
Even time.
#physics
#force
#mass
#acceleration
#time
https://www.sciencealert.com/weve-been-misreading-a-major-law-of-physics-for-the-past-300-years
Armand-Hippolyte-Louis Fizeau died #OTD in 1896.
In 1849, Fizeau calculated a value for the speed of light to a better precision than the previous value determined by Ole Rømer in 1676. In 1850 he measured the relative speeds of light in air and water, using a rotating mirror, however Foucault independently achieved the same result seven weeks earlier.
Fizeau was involved in the discovery of the Doppler effect, which is known in French as the Doppler–Fizeau effect.
I have animated a two-channel ‘CHSH’ Bell test experiment, as a #Python program. It is on #PyPI at https://pypi.org/project/Quantum-Correlations-Visualized/
If you read the source code, it will give an explanation of how the #simulation works. I STRONGLY encourage close study of the source code, for the reader to see that it is legitimate.
For #SciArtSeptember day 17: abstract, my cubist inspired portrait of mathematician Henri Poincaré. This print is about how art movements in art can be connected with contemporary math and physics (and other sciences). Specifically, the way Cubism breaks from a single favoured perspective or absolute frame of reference & attempts to break down subjects into
🧵1/n
#cubism #linocut #printmaking #mathematics #physics #histstm #geometry #HenriPoincaré #mathematician #sciArt #abstract #MastoArt
A new #introduction
My name is Spencer and I decided to join Mastodon because I like the idea behind the #fediverse and a more decentralized system. I also think the alternatives are becoming crappier by the day ...
What social media I've done involves my #hobbies of #gardening and building a #scalemodel when I have time.
My other interests are #reading #sciencefiction and #electronics
I have a background in #Science ( #Physics ) as well.
I hope to make some new connections here! 🙂 🖖
Born in Munich, she survived Nazi internment. After her PhD in #physics from TU (Berlin, ‘48) she immigrated to Canada, did a post-doc & joined faculty at U of T. She pioneered archeometry (use of modern materials analysis in archeology) dating metal & ceramic artifacts. The ancient Chinese Ding vessel represents both her metallurgical research & archeometry & her writing about "prescriptive" versus "holistic" tech used in mass production versus tech used by craft workers & artisans.
🧵2/n
If anyone wants a preview of my #quantum #physics #animated #simulation that actually has no quantum physics in it at all, try
curl https://crudfactory.com/quantum_correlations_visualized.py | python3 - pi/8
You can try other angles. pi/8 and 3pi/8 give maximum magnitude of the correlation coefficient (sqrt(2)).
This is perfectly serious stuff. The theorists have left out some necessary details of random process analysis they do not know are necessary, involving joint pdf and so forth.
We've Been Misreading a Major Law of #Physics For The Past 300 Years
https://www.sciencealert.com/weve-been-misreading-a-major-law-of-physics-for-the-past-300-years
#OTD in 1822. French physicist Augustin-Jean Fresnel, in a "note" read to the Academy of Sciences, reports a direct refraction experiment verifying David Brewster's hypothesis that photoelasticity (as it is now known) is stress-induced birefringence. via @wikipedia
We've been searching for a violation of the universality of free fall for so long - apparently #Google knows more than we do! #Physics #EquivalencePrinciple
Derivation of the correlation coefficient for a two channel Bell-test #experiment:
https://crudfactory.com/eprb_signal_correlations.pdf
#Simulation employing only action by contact (no ‘#entanglement’):
https://github.com/chemoelectric/eprb_signal_correlations
The derivation is done with #probability theory, employing no #quantum #physics whatsoever. It is shown that Bell, Clauser, et al., compute correlation coefficients incorrectly.
An animation is on PyPI. See another pinned toot.
(What #QuantumComputing really ‘is’ is a subject for future research.)
The 2023 Ig Nobel Prize in #Chemistry #Geology was awarded to Jan Zalasiewicz, "for explaining why many scientists like to lick rocks".
The #Physics prize went to Bieito Fernández Castro et al for "measuring the extent to which ocean-water mixing is affected by the sexual activity of anchovies".
Fredkin gate - Wikipedia
"useful property that the numbers of 0s and 1s are conserved throughout, which in the billiard ball model means the same number of balls are output as input. This corresponds nicely to the conservation of mass in physics, and helps to show that the model is not wasteful"
#physics
https://en.wikipedia.org/wiki/Fredkin_gate#:~:text=useful%20property%20that%20the%20numbers%20of%200s%20and%201s%20are%20conserved%20throughout%2C%20which%20in%20the%20billiard%20ball%20model%20means%20the%20same%20number%20of%20balls%20are%20output%20as%20input.%20This%20corresponds%20nicely%20to%20the%20conservation%20of%20mass%20in%20physics%2C%20and%20helps%20to%20show%20that%20the%20model%20is%20not%20wasteful
📣 Job alert 📣
Postdoc position: novel interferometric sensing techniques and seismic noise mitigation in a torsion balance at the @mpi_grav in Hannover.
🗓️ apply by September 30, 2023
@arstechnica funny what people pick up on - the #physics one is my field and it is interesting stuff but nothing out there unlike some of the other studies... lesson learned, replace "spawning" with "sex" in the headline #ButNotAsWeKnowItJim
via Fermilab – Illustration by Olena Shmahalo for NANOGrav - that's me! ✨
—
#MastoArt #art #3D #3Dart #sciart #scienceillustration #science #physics #astrophysics
Dried slug mucus on bark. #gastropod #slime #iridescence #color #slugs #slug #physics #nature #OpticalInterference
Nice infographic from Compound Interest.
If you want a deeper dive into the history of all of this I recommend "Kathy Loves Physics & History" (https://www.youtube.com/@KathyLovesPhysics); her videos are really quite informative.
@j_bertolotti - great animation!
In the usual internet tradition, I will make a nitpicky comment. You wrote
"In the #Physics jargon, a "toy model" is a very simple (often unrealistic) model, which nevertheless capture the essence of the problem..."
but I'd be more modest, like this:
"In the #Physics jargon, a "toy model" is a very simple (often unrealistic) model, which we hope nevertheless captures some essential features of the problem."
It hardly ever captures *all* the essential features, but we hope it captures some - and even if it doesn't, it's still useful, because it's a step toward learning what the essential features are!
"That one must do some work seriously and must be independent and not merely amuse oneself in life-this our mother has told us always, but never that science was the only career worth following."
Irène Joliot-Curie was born #OTD in 1897.
Jointly with her husband, Joliot-Curie was awarded the Nobel Prize for chemistry in 1935 for their discovery of artificial radioactivity. They are the only mother & daughter pair to win Nobel Prizes. via @wikipedia
It's a funny thing, but the actual #mathematics of a Bell test, which I am writing in a paper now (for direct distribution, not publication in the failed journal system), is quite beautiful.
It is a pair of wheels that, when they turn in unison, produce a wave-like effect in the detectors. (One has to imagine PBS that can do a whole 360.) With INVARIANT correlation coefficient.
Yet those incompetent #quantum #physics dunderheads cannot see it, because they are uneducated cultists.
My solution to this Bell test fiasco is quite correct. Any errors are trivial details. The whole thing is really quite a simple and actual rather lovely random process. My IEEE technote-style paper is coming along nicely and shows (w/o QM) that the correlations are invariant under in-unison rotations of the PBS/magnets/etc.
But it has nothing to do with the utter fantasy called "#entanglement", and #quantum #physics is revealed to be the work of dunderpated jackalopes such as Bell and CHSH.
#introduction
Hello all! I'm John, and I love learning, and building open software that makes the world a better place.
I have a physics background, but my interests have meandered through (too) many areas.
Topics I love to learn or chat about:
#rust
#python
#opensource
#procgen
#dataviz
#physics
#electronics
Interested in contributing to areas like #education and global #inequality
If you're into any of the above topics and are interested in collaborating on projects, I'm all ears!
I hate to break it to you #physics nerds, but literally everything is unknown until it's observed.
#schrodinger #SchrödingersCat #schrodingerscat #quantum #quantumPhysics #science
This liquid simulation took like two and a half hours to resolve, but I really like how it turned out.
#blender #blender3d #b3d #physics #liquid #simulation #render #cycles
#Quantum #physics works just fine but it is not really a theory. It is, as Einstein-Podolsky-Rosen correctly demonstrated, a set of empirical laws.
Bohr argued, essentially, that a set of empirical laws is all one should ever want, and the quantum physics community has set out since to prove that a theory is actually impossible.
And they have succeeded! But only by being the people in the sciences most ignorant of logic and principles of plausible inference.
The ‘#QUANTUM #PHYSICS CONFIRMED AGAIN’ experiments are falsified, even though the correlations are actually there.
The correlations have nothing whatsoever to do with magical ‘entanglement’, but quantum physicists are too cult-indoctrinated and too uneducated in mathematics to realize this.
Their broken pseudo-mathematics is incapable of detecting the correlations in their data, and so they have to cheat (with rationalizations, of course) to get positive results.
MORE tags. please see above.
#acoustics #aeronautics #agriculture #anthropology #archaeology #astronomy #biochemistry #biology #botany #computerscience #engineering #exobiology #foodscience #forestry #geology #materialscience #math #mathematics #mechanics #medicine #neurology #oceanography #paleontology #physics #psychology #robotics #tectonics #zoology
For #SciArtSeptember Day 7: indigo a little story of analogy & bias in the most famous physicist of all. My lino block print is inspired by the earliest colour wheel, made by Isaac Newton. When he first split white light in 1665 into the rainbow spectrum of colours, he named & described what he saw as red, orange, yellow, green, blue, indigo and violet (often denoted ROY G BIV).
🧵1/n
#sciArt #histstm #linocut #printmaking #colour #music #spectrum #Newton #physics #light #MastoArt