600 posts tagged with physics.
Displaying 201 through 250 of 600. Subscribe:

Anti matter containment achieved...kinda

We've observed antimatter being created in thunderstorms(previously) and we've created antimatter at CERN.(previously) and (previously) The first experiments, announced last November, were able to trap antimatter for about 1/10th of a second; not long enough to study and analyze it properly. Now the Alpha experiment at CERN has announced that they have successfully trapped anti-hydrogen for 1000 seconds. Nature article preprint from arxive.org
posted by AElfwine Evenstar on Jun 5, 2011 - 57 comments

I still don't get it

Physicists have managed to observe light behaving both as a particle and wave in the same double-slit experimental condition, by means of a new method to weakly observe a particle's momentum. This article in Nature summarizes the results in non-mathematical terms. [more inside]
posted by leibniz on Jun 3, 2011 - 49 comments

It's awesome. It's awesome. It's awesome. It's awesome.

"Physical Impossibilities in My Little Pony: Friendship is Magic" is a student physics presentation that examines three scenes from an animated My Little Pony show and identifies the physics at work, explains (with equations!) why the scenes don't work, and offers suggestions ("dark matter!") to fix them. via BoingBoing
posted by XQUZYPHYR on May 26, 2011 - 139 comments

TEDxCaltech

Sean Carroll: Distant time and the hint of a multiverse [more inside]
posted by kliuless on May 15, 2011 - 52 comments

Shooting cats with a chronophotographic gun

Do cats always land on their feet? No. Unless...
posted by furtive on May 11, 2011 - 37 comments

w o b b l e w o b b l e w o b b l e

And here is a video of Jell-O cubes bouncing, shot at 6200 frames per second.
posted by bayani on May 3, 2011 - 81 comments

Schrodinger's Smartphone

A new paper by William J. Bruno of the Theoretical Biology & Biophysics group at Los Alamos National Laboratory argues that past arguments about the impossibility of biological tissue damage from cellphone signals have failed to consider a quantum effect whereby multiple photons in a small volume can have constructive interference, and that such an effect likely does occur in practice. Synopsis here. (previously) [more inside]
posted by crayz on Apr 28, 2011 - 40 comments

Nature Special Issue on the Future of the PhD

Mark Taylor. Reform the PhD system or close it down. Nature 472, 261 (2011) [more inside]
posted by jeffburdges on Apr 26, 2011 - 54 comments

This view of time does not look encouraging for time travelers

The concept of time as a way to measure the duration of events is not only deeply intuitive, it also plays an important role in our mathematical descriptions of physical systems. For instance, we define an object’s speed as its displacement per a given time. But some researchers theorize that this Newtonian idea of time as an absolute quantity that flows on its own, along with the idea that time is the fourth dimension of spacetime, are incorrect. They propose to replace these concepts of time with a view that corresponds more accurately to the physical world: time as a measure of the numerical order of change.
posted by finite on Apr 25, 2011 - 127 comments

Rumor Sweeping World's Science Community that CERN's LHC has Detected the Higgs Boson -The "God Particle"

Rumor Sweeping World's Science Community that CERN's LHC has Detected the Higgs Boson -The "God Particle" The controversial rumor is based on what appears to be a leaked internal note from physicists at CERN's Large Hadron Collider (LHC), a 17-mile-long particle accelerator near Geneva, Switzerland. It's not certain at this point if the memo is authentic, or what the data it refers to might mean — but the note has sent the physics community into full buzz mode.
posted by Leisure_Muffin on Apr 24, 2011 - 102 comments

Cadbury Creme Eggs, Liquid Nitrogen, MRI Scans, and Extra Dimensions

The science education video series Sixty Symbols (previously) explores the Cadbury Creme Egg. [more inside]
posted by KirkJobSluder on Apr 21, 2011 - 26 comments

The solution to quantum gravity is ready.

... and there is no dark matter/energy! Dr. Philip Mannheim has succeeded in developing a cosmological and quantum field theoretic consistent PT symmetric theory that contains no kind of dark matter and dark energy. Space is flat in the absence of matter, and even the largest galactic rotation curves are predicted. Perhaps most interestingly, it also handles the cosmological constant and zero-point energy 'problems' simultaneously! (This is the final paper in a long list of publications, but it makes the case such that it's importance is immediately recognized. I leave it to the experts to recognize it's true beauty.) All hail the internets!
posted by quanta and qualia on Apr 21, 2011 - 210 comments

Fermilab to announce new physics

The CDF collaboration at Fermilab is set to announce evidence for non-Standard Model physics today. The experiment at the Tevatron particle collider has released a paper on the Arxiv stating it has found evidence for a potential new particle that isn't the Higgs boson. A live stream announcing the results will begin at 4pm Central time (21:00 GMT). [more inside]
posted by auto-correct on Apr 6, 2011 - 50 comments

Play Tesla the Weather Man

You are Nikola Tesla. Dodge obstacles and control the elements as you race to stop Thomas Edison. A game by ThoughtQuake Studios, made using open source software and part of IndieDB's top 100 games of 2010. via BlenderNation.
posted by circular on Mar 14, 2011 - 10 comments

Earth tide

"The Earth tide is a little-known daily event, similar to the oceans' more familiar tides. But the sun and moon's gravity doesn’t just pull on water, it deforms the Earth itself, causing the ground beneath us to bulge toward the pulling heavenly body." [more inside]
posted by Paragon on Mar 10, 2011 - 12 comments

Neutrinos on ice

The IceCube Neutrino Observatory has been completed in Antarctica. What is a Neutrino anyway? Here is an informative video, which seems to draw at least some inspiration from this(NSFW), that explains what neutrinos are and how we can detect them.(via) [more inside]
posted by AElfwine Evenstar on Feb 13, 2011 - 32 comments

What is reality?

Horizon asks "What is reality?" -- youtube for links for those outside the UK: 1, 2, 3, 4. It's a hard question. To help you answer it, Stanford has a set of free courses available on line by Leonard Susskind: General Relativity, Cosmology, New Revolutions in Particle Physics, Quantum Entanglement, Special Relativity, Classical Mechanics, Statistical Mechanics, The Standard Model. (Each link is to lecture 1 of a full college course of a dozen or so lectures.) If you need help with the math, the Khan Academy should help get you up to speed.
posted by empath on Jan 23, 2011 - 67 comments

Freeman Dyson's Global Warming Heresy

The Danger of Cosmic Genius. Why is Freeman Dyson now considered "perhaps our most prominent global-warming skeptic?" Previously
posted by zarq on Jan 19, 2011 - 50 comments

Physics from Hell

It's possible that Galileo arrived at basic laws of physics by studying Dante's Inferno. In 1588, Galileo gave two lectures questioning the scalability of Dante's Hell. A paper questions its importance.
posted by twoleftfeet on Jan 16, 2011 - 24 comments

I Can Has Gravity?

Weightless Cats and other fun experiments. An excerpt from from coverage of research at the Aerospace Medical Division Hq 657Oth Aerospace Medical Research Laboratories including scenes of F-104 seat ejection; drop tests from C-130 and ejection from F-106; effects of weightlessness on cats and pigeons in a C-131; test subjects in water tank, on centrifuge, in heat chamber and on complex coordinator. Also, scenes of vertical deceleration tower, incline impact test facility, vertical accelerator, equilibrium chair and vibration platform. More videos can be found at Airboyd.tv: Accident Animations, Aviation Films, Military Flight Training Films, and Space Shuttle Vidoes.
posted by Fizz on Jan 15, 2011 - 32 comments

Women of the Royal Society and elsewhere

The Royal Society's lost women scientists. Women published in the Royal Society, 1890-1930. Most influential British women in the history of science. Women at the Royal Observatory Greenwich. Heroines of Science. Women Biochemists, 1906-1939. Women in Science. Previously: The Women of ENIAC.
posted by mediareport on Jan 12, 2011 - 9 comments

Energy=Mass of City squared

A Physicist Solves the City [more inside]
posted by Ndwright on Dec 24, 2010 - 37 comments

How does the Large Hadron Collider Work?

A good video animating the different stages of the LHC. (SLYT)
posted by bodywithoutorgans on Dec 8, 2010 - 12 comments

riverrun, past Eve and Adam's, from swerve of shore to bend of bay, brings us by a commodius vicus of recirculation back to Howth Castle and Environs.

to talk about the concept of "time" before the big bang; the Cyclic Universe Theory proposes an alternative to the predominant Inflation Theory that led to this intuition. Now Gurzadyan and Penrose have observed low-variance rings in the CMB, supporting the notion that it makes sense
posted by jjray on Nov 27, 2010 - 41 comments

Sir, we have a antimatter containment breach on deck 10!!!

Antimatter atoms produced and trapped at CERN [more inside]
posted by AElfwine Evenstar on Nov 18, 2010 - 125 comments

Snail Ball

The Geometry of the Snail Ball [pdf] - an interesting article (with some DIY advice at the end) about a toy shop curiosity you may have encountered.
posted by Wolfdog on Nov 16, 2010 - 25 comments

The problem of powering paradise

Professor Brian Cox: "If there were an afterlife I would have to reconsider the engineering design of fridges with a very critical eye" The field of cessation thermodynamics considers how the hereafter might be powered - probably without 21 grams of human soul - and whether this may mean hell will freeze over. [more inside]
posted by rongorongo on Nov 15, 2010 - 19 comments

The Circular Jump is a White Hole

Circular jumps (previously) form when you turn on your tap and the water lands in a thin circular disk with a raised lip. Jannes et al have now shown that circular jumps are examples of hydrodynamic white holes: waves can escape the jump, but not enter it. [more inside]
posted by jjray on Nov 13, 2010 - 19 comments

That darn cat!

Scientists have finally discovered tyhe physics of how cats drink.
posted by Daddy-O on Nov 12, 2010 - 51 comments

And it's going, going, GONE!

The Longest Home Run Ever
posted by zarq on Nov 5, 2010 - 41 comments

Fucking electromagnetism: How does it work?

Physicist responds to Troll Physics.
posted by emilyd22222 on Oct 26, 2010 - 59 comments

Calculating the Madness of People

Unpopular Science: One man's unhappy encounters with the laws of physics.
posted by spiderskull on Oct 25, 2010 - 7 comments

from complexity, universality

A brief tour of the mysteriously universal laws of mathematics and nature. [more inside]
posted by kliuless on Oct 24, 2010 - 33 comments

The Future of Fundamental Physics

Renowned theoretical physicist Nima Arkani-Hamed gave a series of five Messenger lectures on "The Future of Fundamental Physics" at Cornell University two weeks ago. 1 3 4 5 [more inside]
posted by bread-eater on Oct 20, 2010 - 15 comments

(?:Ig)? Nobel Laureate

Andre Geim has earned many awards from his peers for groundbreaking research in physics, but he's arguably only won the attention of the general public a couple times: First for levitating a frog, and then for discovering 2D atomic crystals. For these efforts he has become the first person to be a laureate of both the Ig Nobel Prize and Nobel Prize.
posted by ardgedee on Oct 5, 2010 - 12 comments

What would happen if you put your hand in the Large Hadron Collider.

Several physicists weigh in on what would happen if you were to place your hand in the proton stream of the Large Hadron Collider at CERN. There's not a definite answer...the responses range from "nothing" to "you'd die for sure, instantly". [more inside]
posted by albrecht on Oct 1, 2010 - 53 comments

Dance the microtubule tango

While working on a PhD, did you ever feel no one understood your research? Well instead of writing your dissertation about your topic, ““Microtubule Catastrophe in Living Cells” or “Hydrodynamic Trail Following in a Harbor Seal (Phoca vitulina)”, you can dance to it. Or, if you don’t want to dance to a science topic, then change your topic and publish research about zombies as a disease model. [more inside]
posted by Wolfster on Sep 29, 2010 - 3 comments

Hello

(over-simplified) Anatomy of a Typical Phone Conversation
posted by ocha-no-mizu on Sep 29, 2010 - 19 comments

danyk's Electromagnetic Shenanigans

(MLYT) Danyk666 and his microwave oven, danyk and his unshielded Source, danyk's little jacob's ladder, danyk heats water, zaps a CD, uses wrong AC power. Also hairspray high-volt abuse, his flyback transformer no workee (wait for it), carbon scoring on your droids? And danyk's small shaded-pole motor ...OF DEATH!!! [more inside]
posted by billb on Aug 25, 2010 - 35 comments

The Fate of the Universe

Fate of Universe revealed by galactic lens [spoiler alert] [more inside]
posted by Joe Beese on Aug 20, 2010 - 45 comments

Does the Past Still Exist?

Is our present defined by decisions we make in the future? And maybe we don't know who killed JFK because the universe hasn't decided yet. A Huffington Post science blogger discusses the nature of history from a quantum perspective. To quote Stephen Hawking, "The histories of the universe depend on what is being measured, contrary to the usual idea that the universe has an objective observer-independent history." [more inside]
posted by GnomeChompsky on Aug 20, 2010 - 95 comments

That Was the This Week's Finds That Was

The 300th issue of This Week's Finds in Mathematical Physics will be the last. It is not an exaggeration to say that when John Baez started publishing TWF in 1993, he invented the science blog, and an (academic) generation has now grown up reading his thoughts on higher category theory, zeta functions, quantum gravity, crazy pictures of roots of polynomials, science fiction, and everything else that can loosely be called either "mathematical" or "physics." Baez continues to blog actively at n-category cafe and the associated nLab (an intriguingly fermented commune of mathematicians, physicists, and philosophers.) He is now starting a new blog, Azimuth, "centered around the theme of what scientists can do to help save the planet."
posted by escabeche on Aug 14, 2010 - 17 comments

It's the end of space-time as we know it, and I feel fine.

Those wacky New Scientists are reporting on a "new challenge" to part of Einstein's theory of special relativity that changes the relationship of Space to Time. No, this has nothing to do with Conservapedia's laughable challenge to the theory*. Petr Hořava** won't replace Einstein*** in scientific importance in this new Century, but maybe Hendrik Lorentz whose theories on symmetry apparently take a beating****. Remember kiddies, Science (especially Physics) doesn't have Absolute Truths, it just keeps getting closer to them. And even ol' Albert E. can and WILL be improved upon. [more inside]
posted by oneswellfoop on Aug 10, 2010 - 37 comments

Position-based quantum cryptography theoretically proved

Our results open a fascinating new direction for position-based security in cryptography where security of protocols is solely based on the laws of physics and proofs of security do not require any pre-existing infrastructure.
posted by Joe Beese on Aug 8, 2010 - 47 comments

What the pangeaists don't want you to know

Don't continue fooling yourself. The earth is growing and expanding rapidly. Despite plate tectonics' popular acceptance in the 60s, Samuel Warren Carey, the father of modern expansion tectonics, was publicly promoting his theories of an expanded earth as late as 1981. One of the theory's most prominent modern spokesmen is comics artist Neal Adams, who has created a number of informative videos about a new model of the universe that even manages to explain why the dinosaurs died out. [more inside]
posted by Lorc on Aug 7, 2010 - 77 comments

If these pants could talk

Small amounts of sound can now be harvested by this special fabric to produce very small amounts of current. And what if there was a clever, logic-defying way to possibly greatly enhance the conversion capabilities of such piezoelectric materials? Then maybe I'll get that "Power Suit" I always wanted.
posted by cross_impact on Jul 22, 2010 - 18 comments

Shooting rabbits takes on a whole new meaning

A video of a bunch of CG physics demonstrations that can be interacted with in real time.
posted by cthuljew on Jul 20, 2010 - 32 comments

Gravity is Optional

Physicist Erik Verlinde proposed in a recent paper that the force of gravity can be derived from the principles of thermodynamics. NY Times explains. [Physicist Lee] Smolin called it, “very interesting and also very incomplete.”
posted by jjray on Jul 12, 2010 - 55 comments

Physics of Phootball

Free during the World Cup the IOP (Institute of Physics) has a collection of papers all about football (soccer). Also related is NASA's recent findings regarding the randomness of the new Adidas ball.
posted by ozomatli on Jul 6, 2010 - 8 comments

What the Earth knows

Experts are little help in the constant struggle in this conversation to separate myth from reality, because they have the same difficulty, and routinely demonstrate it by talking past each other. Respected scientists warn of imminent energy shortages as geologic fuel supplies run out. Wall Street executives dismiss their predictions as myths and call for more drilling. Environmentalists describe the destruction to the earth from burning coal, oil, and natural gas. Economists ignore them and describe the danger to the earth of failing to burn coal, oil, and natural gas. Geology researchers report fresh findings about what the earth was like millions of years ago. Creationist researchers report fresh findings that the earth didn’t exist millions of years ago. The only way not to get lost in this awful swamp is to review the basics and decide for yourself what you believe and what you don’t. [more inside]
posted by infinite intimation on Jun 27, 2010 - 31 comments

Page: 1 2 3 4 5 6 7 8 ... 12