610 posts tagged with physics.
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That’s why it doesn’t matter if God plays dice with the Universe

Discovering Free Will (Part II, Part III) - a nice discussion of the Conway-Kochen "Free Will Theorem". [more inside]
posted by Wolfdog on Mar 4, 2014 - 92 comments

John Baez on the maths of connecting everyone (and everything) on earth

Network Theory Overview - "The idea: nature and the world of human technology are full of networks! People like to draw diagrams of networks. Mathematical physicists know that in principle these diagrams can be understood using category theory. But why should physicists have all the fun? This is the century of understanding living systems and adapting to life on a finite planet. Math isn't the main thing we need, but it's got to be part of the solution... so one thing we should do is develop a unified and powerful theory of networks." (via ;)
posted by kliuless on Mar 2, 2014 - 17 comments

The Theoretical Minimum

How condensed might one expect an overview of all modern physics to be? Leonard Susskind has an answer, and provides The Theoretical Minimum. [more inside]
posted by Alex404 on Feb 27, 2014 - 13 comments

ITER

A Star in a Bottle. "An audacious plan to create a new energy source could save the planet from catastrophe. But time is running out."
posted by homunculus on Feb 25, 2014 - 52 comments

The perfect billiards break

What would happen if a cue ball struck a rack of 15 perfectly round, frictionless billiard balls, exactly head-on?
posted by escabeche on Feb 3, 2014 - 31 comments

Looking Deep Inside Nature

X-ray photography of plants and animals by physicist Arie van’t Riet. [via]
posted by brundlefly on Jan 27, 2014 - 5 comments

Everybody Talks About The Weather...

From I Fucking Love Science: "In a paper posted online this week Professor Stephen Hawking claimed that black holes do not exist - at least, not as we currently understand them. He claims that the traditional notion of a black hole's "event horizon" from which nothing can escape, even light, is incompatible with quantum physics. If so, physicists will have to redefine black holes entirely." [more inside]
posted by runcibleshaw on Jan 27, 2014 - 44 comments

The Chain Fountain

A video showing a chain of beads behaving in a very peculiar way appeared on Youtube some time ago. Many people attempted to provide explanations, but most of them weren't quite satisfactory. [more inside]
posted by tykky on Jan 17, 2014 - 30 comments

I Was Told There Would Be No Math

M.I.T. professor Max Tegmark explores the possibility that math does not just describe the universe, but makes the universe.
posted by COD on Jan 14, 2014 - 111 comments

Pterosaur Aerodynamics at GWU

A series of blog posts by George Washington University engineering students on the aerodynamics of pterosaur flight. [more inside]
posted by brundlefly on Jan 7, 2014 - 12 comments

See how the ants drip like syrup?

Physicists study fire ants (SLNYT)
posted by angrycat on Dec 28, 2013 - 14 comments

A Universe In Which Time Has No Beginning

"Maybe the Big Bang never happened because the universe never began because it has always existed." Scientific American magazine revisits the decade-old idea that we live in a "Rainbow" universe (where different wavelengths of light experience spacetime differently and where the big bang may never have happened) following the publication of new physics research on the subject.
posted by rcraniac on Dec 10, 2013 - 83 comments

One pill makes you nano, and one pill makes you giga...

The pressure of a human bite is about 1/9th of the atmospheric pressure on Venus. The fastest bacterium on earth is just outstripping the fastest glacier. A square meter of sunshine in the spring imparts about 1 horsepower. [more inside]
posted by kagredon on Dec 7, 2013 - 20 comments

Gravity Visualized

Dan Burns explains his space-time warping demo at a PTSOS workshop at Los Gatos High School, on March 10, 2012. [more inside]
posted by Blasdelb on Dec 3, 2013 - 27 comments

binding the andat

Closing in on the twin prime conjecture (Quanta) - "Just months after Zhang announced his result, Maynard has presented an independent proof that pushes the gap down to 600. A new Polymath project is in the planning stages, to try to combine the collaboration's techniques with Maynard's approach to push this bound even lower." [more inside]
posted by kliuless on Dec 1, 2013 - 16 comments

ASCII fluid simulator

ASCII fluid simulator (source code)
posted by Blazecock Pileon on Nov 30, 2013 - 24 comments

We Saw Nothing

"We have entered the new millennium and yet we still have no idea what 95% of the universe is made of." The Large Underground Xenon experiment has failed to see a single particle of Dark Matter. Will the Lux Zeplin have better luck?
posted by billiebee on Oct 30, 2013 - 79 comments

An animator explains why she studies physics

After all, she's not just sitting here doing nothing.
posted by Brandon Blatcher on Oct 27, 2013 - 9 comments

Maybe No Longer Forever 20 Years Away?

National Ignition Facility (NIF) achieves fusion break-even "...The latest achievement has been described as the single most meaningful step for fusion in recent years, and demonstrates NIF is well on its way towards the coveted target of ignition and self-sustaining fusion."
posted by growli on Oct 7, 2013 - 34 comments

The Leidenfrost Maze

When a liquid is dropped onto a smooth plate that is heated to a specific temperature well above its boiling point, boiled vapor will get trapped underneath the remainder of the droplet insulating it from the hot plate, allowing it to dance around the plate like oil on a wet surface in what is known as the Leidenfrost effect. Intriguingly, surfaces that are grooved into the shape of a saw blade will cause droplets suspended by the Leidenfrost effect to predictably skitter in the direction of the groove, allowing University of Bath undergraduate students Carmen Cheng and Matthew Guy to build a fascinating maze. [more inside]
posted by Blasdelb on Oct 2, 2013 - 32 comments

Level Up

Untold Riches: An Analysis Of Portal’s Level Design, from RPS, who have been looking at level design in their Level With Me series of interviews. Meanwhile Valve will be announcing something Monday morning - probably not Half Life 3.
posted by Artw on Sep 20, 2013 - 107 comments

My God, it's full of... everything

Revelations in the field of quantum physics have resulted in the discovery of the Amplituhedron, a jewel-like higher dimensional object whose volume elegantly predicts fundamental physical processes that took the brilliant Dr. Richard Feynman hundreds of pages of abstruse mathematics to describe. The theoretical manifold not only enables simple pen-and-paper calculation of physics that would normally require supercomputers to work out, but also challenges basic assumptions about the nature of reality -- forgoing the core concepts of locality and unitarity and suggesting that space and time are merely emergent properties of a timeless, infinitely-sided "master amplituhedron," whose geometry represents the sum total of all physical interactions. More: The 152-page source paper on arXiv [PDF] - Lead author Nima Arkani-Hamed's hour-long lecture at SUSY 2013 - Scans of Arkani-Hamed's handwritten lecture notes - A far more detailed lecture series "Scattering Without Space Time": one, two, three - Arkani-Hamed previously on MeFi - A hot-off-the-presses Wikipedia page (watch this space)
posted by Rhaomi on Sep 18, 2013 - 128 comments

Possibly the end of The Big Bang Theory? (Not the TV show)

Nature covers a brane based theory of cosmological creation... Is the universe a 3D brane created from a 4D star collapsing into a black hole? [more inside]
posted by Samizdata on Sep 16, 2013 - 110 comments

The Feynman Lectures on Physics

Caltech and The Feynman Lectures Website are pleased to present this online edition of The Feynman Lectures on Physics. Now, anyone with internet access and a web browser can enjoy reading a high-quality up-to-date copy of Feynman's legendary lectures.
posted by Artw on Sep 14, 2013 - 27 comments

Superposition

Covariance is a particle detector-inspired art installation in the London Canal Museum's ice wells. It is part of the Superposition: physicists and artists in conversation project.
posted by homunculus on Aug 28, 2013 - 3 comments

Schrodinger's cat new Cheshire grin

Physicist Art Hobson disentangles 'Schrodinger's cat' debate. The solution is within the framework of standard quantum physics. 'In an article published August 8 by Physical Review A, a journal of the American Physical Society, Hobson argues that the phenomenon known as "nonlocality" is key to understanding the measurement problem illustrated by "Schrodinger's cat."'
posted by VikingSword on Aug 26, 2013 - 29 comments

All to do with honor and country

Why particle physics matters [no pun intended]. Physicists from around the world talk about why we study the nature of the universe. [via] [more inside]
posted by Eideteker on Aug 20, 2013 - 17 comments

conservation of information

A Black Hole Mystery Wrapped in a Firewall Paradox - "A paradox around matter leaking from black holes puts into question various scientific axioms: Either information can be lost; Einstein's principle of equivalence is wrong; or quantum field theory needs fixing." [more inside]
posted by kliuless on Aug 18, 2013 - 36 comments

Paperscape

Paperscape is a searchable 2-dimensional visualization of the 800,000+ scientific papers (mostly in physics and math) on the arXiv preprint server.
posted by escabeche on Aug 18, 2013 - 20 comments

Neutrino and meson breakthroughs

While perhaps not quite as errm climactic as yesterday's news of pitch dripping in Trinity College, physics news dripping out of Stockholm reveals that
  • The Super Kamiokande T2K group has verified with great certainty that neutrinos oscillate among 3 flavors in flight (which could help explain what happened to the antimatter in the universe), and
  • CERN has used the LHC to measure the decay time of the rare B sub s meson, ending a 25-year search.

  • posted by Twang on Jul 20, 2013 - 9 comments

    The crumbs off his plate are the entire careers of other people.

    Neil Degrasse Tyson waxes eloquent about Isaac Newton [chopped YouTube link, full length video 'SciCafe: Life the Universe and Everything' here] [more inside]
    posted by mysticreferee on Jul 19, 2013 - 8 comments

    Moving a very large magnet to measure very small particles.

    By making a very precise measurement of the muon g-2 value and comparing the results to its predicted value, researchers at Fermilab hope to uncover evidence of new, undiscovered particles and forces. This continues work done at Brookhaven National Laboratory a decade ago. To do so, Fermilab needs their 50-ft ring magnet and its fragile, precisely assembled superconducting coils. After six months of planning, the magnet was slowly hauled on an eight-axle trailer through the streets of Long Island, loaded onto a barge, and tugged down the Atlantic coast and into the Gulf of Mexico, where it will go up the Tennessee-Tombigbee Waterway to the Mississippi and then through Illinois waterways before it's trucked again through suburban Chicago. Fermilab has a photo and video gallery and is posting updates. [more inside]
    posted by hydrophonic on Jul 12, 2013 - 24 comments

    Assume A Cylindrical Cow

    The Mathematics of the Manhattan Project
    posted by empath on Jul 10, 2013 - 40 comments

    The number of constituent particles in one mole of a given substance.

    Avogadro Project - The International Avogadro project relates the kilogram to the mass of a fixed number of atoms by measuring the number of atoms in a sphere of silicon. I'll leave this here.
    posted by hypersloth on Jun 8, 2013 - 26 comments

    Physics + Art = Awesome.

    This is the current state of YoYo mastery. It is excellent.
    posted by lazaruslong on Jun 6, 2013 - 27 comments

    Is Nature Unnatural?

    Decades of confounding experiments have physicists considering a startling possibility: The universe might not make sense. For you Saturday night science read, a very interesting science article, one of many on the Simons Foundation web site
    posted by Long Way To Go on Jun 1, 2013 - 84 comments

    This looks legit

    Eric Weinstein has a PhD in mathematical physics from Harvard, but has spent most of the last 10 years outside academia working as an economic consultant for a New York hedge fund. Now he apparently has a new theory of everything that claims to be able to explain quantum gravity, dark matter and dark energy. Actual details have not yet been provided and some physicists are dismissive. But his work has received enthusiastic endorsement from Oxford's Simonyi Professor of Public Understanding Marcus du Sautoy, with whom he has been discussing the theory over the last two years. [more inside]
    posted by leibniz on May 24, 2013 - 105 comments

    doing things in the most complicated way possible is just what he does

    A titanium engagement ring that lights up via magnetic induction.
    posted by GuyZero on May 21, 2013 - 64 comments

    always twirling, twirling, twirling towards freedom

    Rebound. A simple physics game with 2 controls. How far to the right can you go? [more inside]
    posted by garlic on May 20, 2013 - 32 comments

    Perpetual Motion, maybe for real

    Now, a technological advance has made it possible for physicists to test the idea. They plan to build a time crystal, not in the hope that this perpetuum mobile will generate an endless supply of energy (as inventors have striven in vain to do for more than a thousand years) but that it will yield a better theory of time itself.
    Nobel laureate Frank Wilczek's "somewhat embarassing" idea will be put to the test as scientists try to build time crystals.
    posted by hippybear on Apr 30, 2013 - 73 comments

    Pathological Physics: Tales from "The Box"

    This is a talk I gave on June 1, 2012, about the numerous crank physics letters and books that had been sent to, and saved by, the Physics Department at Cal Poly in San Luis Obispo, CA.
    Don't believe the apparent video length, the talk is 41 minutes long and the camera sticks around for about 20 minutes of the awesome Q&A afterwards.
    [more inside]
    posted by Blasdelb on Apr 30, 2013 - 67 comments

    It will have 10-20 failures and two successes. That's my hypothesis.

    7-year old Audri builds a Rube Golberg machine to trap a monster. (SLYT) [more inside]
    posted by Room 641-A on Apr 23, 2013 - 42 comments

    "Ring it Out"

    Last fall, the Canadian Space Agency asked students to design a simple science experiment that could be performed in space, using items already available aboard the International Space Station. Today, Commander Chris Hadfield conducted the winner for its designers: two tenth grade students, Kendra Lemke and Meredith Faulkner, in a live feed to their school in Fall River, Nova Scotia. And now, we finally have an answer to the age-old question, What Happens When You Wring Out A Washcloth In Space? [more inside]
    posted by zarq on Apr 18, 2013 - 63 comments

    Many a Maester have tried to play the Game of Weather Patterns

    "...here we attempt to explain the apparently erratic seasonal changes in the world of [Georege R.R. Martin]. A natural explanation for such phenomena is the unique behavior of a circumbinary planet."
    posted by Midnight Rambler on Apr 5, 2013 - 38 comments

    Nothing is the most important part of the Universe.

    The concept of nothing is as old as zero itself. How do we grapple with the concept of nothing? From the best laboratory vacuums on Earth to the vacuum of space to what lies beyond, the idea of nothing continues to intrigue professionals and the public alike. Join moderator and Hayden Planetarium Director Neil deGrasse Tyson as he leads a spirited discussion with a group of physicists, philosophers and journalists about the existence of nothing. The event, which was streamed live to the web, took place at the American Museum of Natural History on March 20, 2013. [more inside]
    posted by lazaruslong on Mar 25, 2013 - 32 comments

    The economics of time travel

    Would time travellers affect security prices? An article by Richard Hudson. [more inside]
    posted by medusa on Mar 25, 2013 - 30 comments

    Mind is moving

    Ron Garret, formerly of JPL and Google and "the most referenced computer science researcher in all of NASA", has an interesting take on quantum mechanics he dubs "zero-worlds", which he presents in an hour-long Google Tech Talk (meat starts around 42 minutes) as well as slightly older paper. He also got into a bit of further debate here. [more inside]
    posted by crayz on Mar 23, 2013 - 26 comments

    +

    "I'm confident that it's a Higgs particle. I don't need to call it Higgs-like any more...I may need to eat my words one day, but I think that's very unlikely."
    "Cern scientists believe newly discovered particle is the real Higgs boson. Results of analysis at Cern in Switzerland show particle behaves precisely as expected." Previously
    posted by Fizz on Mar 15, 2013 - 53 comments

    Aspiring Animators & Game Designers, Study Your Calculus & Combinatorics

    Every film Pixar has produced has landed in the top fifty highest-grossing animated films of all time. What's their secret? Mathematics. Oh, and 22 Rules of Storytelling. [more inside]
    posted by zarq on Mar 8, 2013 - 40 comments

    The Professor, the Bikini Model and the Suitcase Full of Trouble

    A world-renowned physicist meets a gorgeous model online. They plan their perfect life together. But first, she asks, would he be so kind as to deliver a special package to her?
    posted by Optamystic on Mar 8, 2013 - 196 comments

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