Sir Roger Penrose, Aeons before the Big Bang (Copernicus Center Lecture 2010) NASA's Next Mission to Mars. Effect of panel shape of soccer ball on its flight characteristics : Scientific Reports. Drag force in the wind tunnel The wind tunnel tests were conducted using different new soccer balls, namely, Brazuca (Adidas, six-panel), Cafusa (Adidas, 32-panel), Jabulani (Adidas, eight-panel), Teamgeist 2 (Adidas, 14-panel), and conventional (Vantaggio, Molten, 32-panel).
The balls were mounted as shown in Figure 1. Two panel orientations of the soccer balls identified as orientations A and B (see Figure 2) were used for the study, and the corresponding aerodynamic properties were measured. (a, b) Adidas Brazuca: small dimple and six panels, (c, d) Adidas Cafusa: small grip texture and 32 modified panels, (e, f) Adidas Jabulani: small ridges or protrusions and eight panels, (g, h) Adidas Teamgeist 2: small protuberances and 14 panels; (i, j) Molten Vantaggio (conventional soccer ball): smooth surface and 32 pentagonal and hexagonal panels. (Photo by S.H.). Full size image (129 KB) It was observed that the drag varied substantially with the ball type (Figure 3).
Full size image (210 KB) How simple ideas lead to scientific discoveries - Adam Savage. Michio Kaku: The Universe in a Nutshell. Scientists Work Out How To Make Matter From Light. Theoretical physicists have proposed a way they think will allow us to create matter from light.
The experiment has yet to be done, but has passed peer review as practical and the inventors are in discussions with experimentalists with the equipment to carry it out. The proposal has created excitement because, while it has been accepted for 80 years that two photons of light could theoretically create matter, for that time the demonstrational proof was regarded as beyond the reach of lab equipment.
As Einstein's much quoted, but seldom understood, equation e=mc2 tells us, matter and energy are connected. 'Best computer model yet of our universe' revealed today. A large galaxy cluster — together with a dense halo of dark matter — formed at the centre of the simulated Universe.
Courtesy Illustris. A new virtual depiction of the cosmos developed by scientists in the US, Germany and England shows detail never before achieved in a computer-generated simulation. The numerical-based model Illustris covers the universe's 13 billion-year evolution, starting 12 million years after the Big Bang, or creation. It accurately depicts various galaxies' distribution and makeup. More in the journal Nature: Mark Vogelsberger, a physicist at the Massachusetts Institute of Technology in Cambridge, and his colleagues created a model of the Universe that follows the evolution of both visible and dark matter starting just 12 million years after the Big Bang (see video). Laser Pulse Imaged Through Bottle At 1 Trillion Frames Per Second. Disney’s award-winning film Frozen is the highest grossing animated film of all time and was shot at 24 frames per second (fps).
Some of the most mesmerizing slow motion films have been made at a rate of about 4,000 fps. Imagine then, if you will, what a film would look like if it were made at one trillion fps. Could individual photons be identified? How can a camera even capture that? Inflation & the Universe in a Grapefruit - Sixty Symbols. Causal contact. Two entities are in causal contact if there may be an event that has affected both in a causal way.
Every object of mass in space, for instance, exerts a field force on all other objects of mass, according to Newton's law of universal gravitation. Cosmic Superstrings - Sixty Symbols. What is the shortest possible time? Fusion vs. Fission. Biodegradable battery could melt inside the body. Univ.
Illinois. Do yourself a favor and read Einstein's paper on special relativity. On the Electrodynamics of Moving Bodies. By A.
Einstein June 30, 1905 It is known that Maxwell's electrodynamics—as usually understood at the present time—when applied to moving bodies, leads to asymmetries which do not appear to be inherent in the phenomena. Take, for example, the reciprocal electrodynamic action of a magnet and a conductor. The observable phenomenon here depends only on the relative motion of the conductor and the magnet, whereas the customary view draws a sharp distinction between the two cases in which either the one or the other of these bodies is in motion.
For if the magnet is in motion and the conductor at rest, there arises in the neighbourhood of the magnet an electric field with a certain definite energy, producing a current at the places where parts of the conductor are situated. The Chaotic Wheel. Build a Lorenzian Waterwheel.
Run tests and confirm the systems chaotic nature. Explore the parameter space of the wheel. The Chaotic Wheel. 17 Equations That Changed The World. The Manhattan Project. Iakov Zeldovitch. Eightfold Way (physics) In physics, the Eightfold Way is a term coined by American physicist Murray Gell-Mann for a theory organizing subatomic baryons and mesons into octets (alluding to the Noble Eightfold Path of Buddhism).
The theory was independently proposed by Israeli physicist Yuval Ne'eman and led to the subsequent development of the quark model. The baryon decuplet The baryon octet Baryon Supermultiplet using four-quark models and half spin Particle physics and representation theory.
Relativité. Quantique. Physics Education - (Ed extended footage) Physics Education - (Tony extended footage) Physics Education - (Phil extended footage) Pdf/physics/0312087.pdf. The Feynman inverse sprinkler problem: A demonstration and quantitative analysis. SAO/NASA ADS Physics Abstract Service · Electronic Refereed Journal Article (HTML)· References in the article· Citations to the Article (8) (Citation History) · Refereed Citations to the Article· Reads History· · Translate This Page Abstract The results of an experiment designed to illustrate the effects of hooking a common lawn sprinkler to a suction, rather than to a pressure, source are presented.
The inverse sprinkler moves in a direction opposite to that of the normal sprinkler with an angular momentum opposite to and approximately equal to that of the fluid in the sprinkler arms. Recent experiments designed to test this effect may have produced a null result because of friction associated with the systems. The long-running mystery of the Feynman Sprinkler. Prettygoodphysics - PGP-Modern Physics. Please share comments & files for teaching modern physics topics.
Here is a short handout with some important milestones in the development of the quantum theory from Planck through Bohr to deBroglie. Notes by David Derbes. Thanks. This zipped folder includes files onPlank and BlackBody Radiation; Stefan Boltzmann Law; The Particle in Box; The Harmonic Oscillator In Quantum Mechanics; Feynman's Derivation of the Schroediner equation; George Gamow's Treatment of Alpha Decay; Hydrogen Atoms in Quantum Mechanics.Modern Physics Notes: Notes supplied by Wayne Mullins.
Expanding Earth. Mesoscale physics buzz eludes exact definition. The future of physics will depend crucially on researchers’ ability to tackle phenomena at the mesoscale, an enigmatic realm that bridges quantum and classical physics. On that point, speakers at a special session and Town Hall meeting yesterday at the American Physical Society’s March meeting in Boston, Massachusetts, were in agreement. But what exactly is the mesoscale, and what kind of research is needed to understand it?
That question brought forth multiple overlapping answers.
Parallel Universes: Many Worlds. A temperature below absolute zero. Atoms at negative absolute temperature are the hottest systems in the world January 04, 2013 What is normal to most people in winter has so far been impossible in physics: a minus temperature. On the Celsius scale minus temperatures are only surprising in summer. There is no "Fourth" dimension. How lasers work (in theory) Richard Feynman Rubber Bands.
Richard Feynman Magnets. Math:Rules - Strange Attractors on Behance. Non-squeezing theorem. Background and statement[edit] We start by considering the symplectic spaces. Pdf/1208.5969.pdf. Phys.Org - Science News, Technology, Physics, Nanotechnology, Space Science, Earth Science, Medicine. Stephen Hawking on time travel, M-theory, and extra terrestrial life. Stephen Hawking is near-universally recognized as a brilliant scientist, and one small facet of his complex genius is the rockstar ability to democratize scientific knowledge. It's becoming increasingly important as purveyors of pop culture continue to eschew acknowledgment and respect for the most basic scientific principles.
Hollywood in particular has continued its marginalization of scientific knowledge with blatant disregard in recent films. But Hawking acts like a great counter force against anti-intellectual movements. He takes complex scientific principles and explains them so the general public can understand and, more importantly, appreciate the science behind them. Nikola Tesla: Great Minds. What is Touch?
Matériaux. Contrôler le son par la lumière et vice-versa. La lumière a toujours été centre d'intérêt. Aujourd'hui, on la retrouve dans les lasers ou les LEDs, par exemple. Les chercheurs vont plus loin dans son étude et s'intéressent maintenant au phonon, l'équivalent sonore du lumineux photon. Un phénomène météo rarissime en timelapse. Porter de l'eau à ébullition ... sans les bulles ! Les scientifiques ont trouvé le moyen de faire bouillir l'eau, mais sans faire de bulles. Spin Art - Is Black Really Black? at Steve Spangler Science. 03/27 > BE Belgique 60 > Des chercheurs de l'ULB et de l'Université de Gant ont réalisé un calculateur analogique optique.
PhysiqueDes chercheurs de l'ULB et de l'Université de Gant ont réalisé un calculateur analogique optique Des chercheurs d'OPERA, Ecole polytechnique de Bruxelles - Prof. Marc Haelterman et Serge Massar, en collaboration avec des chercheurs de l'Université de Gand ont réalisé un calculateur analogique optique basé sur le concept du "réservoir computer". Réalisé en fibre optique, ce calculateur utilise des composants standards dans l'industrie des télécommunications. Il peut aisément être reprogrammé pour réaliser une grande variété de tâches. Les chercheurs montrent, par exemple, que leur calculateur peut corriger les distorsions apparaissant lors de communications sans fil; il peut aussi réaliser de la reconnaissance vocale en temps réel et avec des performances comparables aux meilleurs algorithmes digitaux connus.
Molecular "Wankel Engine" Driven By Photons. Ebook. 03/07 > BE Suisse 30 > Première observation de la transition simultanée de deux électrons de la couche K avec émission d'un seul photon. PhysiquePremière observation de la transition simultanée de deux électrons de la couche K avec émission d'un seul photon. 03/07 > BE Suisse 30 > Elaboration d'une machine moléculaire capable d'identifier et d'éliminer les cellules cancéreuses.
MédecineElaboration d'une machine moléculaire capable d'identifier et d'éliminer les cellules cancéreuses. 03/09 > BE Etats-Unis 281 > Contrôler la largeur du gap en énergie des matériaux opto-électroniques : une nouvelle avancée. Blogs.rue89.com/sites/blogs/files/assets/document/2012/02/ponytail_0.pdf.
Physicists Store Short Movie In A Cloud of Gas. Chinese Physicists Smash Distance Record For Teleportation Maryland Scientists Harness Thousands of Invisibility Cloaks to Trap a Rainbow. La toute première mesure spectroscopique de l'antihydrogène ! > Nucléaire. Attracteur de Lorenz. Edward Lorenz. Roger Penrose. Accelconf.web.cern.ch/AccelConf/e06/PAPERS/THESPA01.PDF. INI : GMRw04 : Penrose, 2005-11-07 : Before the Big Bang? A new perspective on the Weyl curvature hypothesis : frames. Pdf/0710.3879v2.pdf. Penrose's Philosophical Error.
One-Minute Physics: How wings really create lift. L’effet “Noix du Brésil” Richard Feynman on Beauty, Honors, and Curiosity. The Horizon Run 2 & 3.
Six Easy Pieces: Essentials of Physics Explained by Its Most Brilliant Teacher (9780465025275): Richard P. Feynman, Robert B. Leighton, Matthew Sands. What is up with Noises? (The Science and Mathematics of Sound, Frequency, and Pitch)