Eufisica - Resonance Experiment #Physics #sound. Amazing Resonance Experiment! Eufisica - Einstein's Field Equation #Physics. Eufisica - The Standard Model. #Physics #particles. Eufisica - Optical Illusion. #Physics #optics. Eufisica - The Standard Model. #Physics #particles. Eufisica - Optical Illusion. #Physics #optics. Physics: Transforming lives | Physics. Smile, hydrogen atom, you're on quantum camera ...
Focus: A New Direction for Thermoelectric Cooli... Europe's Updated Particle Physics Plan Weighty ... The Vacuum is NOT Empty | Physics. Hofstadter's butterfly spotted in graphene - physicsworld.com. Hofstadter's butterfly – a stunning fractal pattern that describes the behaviour of electrons in a magnetic field – has been measured experimentally for the first time.
The breakthrough has been made by three research groups that looked at the electronic properties of graphene placed on a boron-nitride surface. As well as confirming a theoretical prediction made nearly 40 years ago, the results could find use in electronic and optoelectronic devices. The concept of Hofstadter's butterfly dates back to 1976 when the American physicist Douglas Hofstadter – best known for his Pulitzer-prize-winning book Gödel, Escher, Bach – calculated the energy levels of electrons exposed to a magnetic field in a 2D lattice. He treated the electrons as idealized "Bloch electrons", which means they do not interact with one another and move in a periodic electric potential commensurate with the lattice. 2D superlattices 'Rare and tremendously exciting' New materials. 19 Ways That Art and the LHC Open a Portal to Physics [Interactive] 5 things you should never do with a particle accelerator. Icists demonstrate transfer of ultraprecise time signals over a wireless optical channel.
By bouncing eye-safe laser pulses off a mirror on a hillside, researchers at the National Institute of Standards and Technology (NIST) have transferred ultraprecise time signals through open air with unprecedented precision equivalent to the "ticking" of the world's best next-generation atomic clocks. Described in Nature Photonics, the demonstration shows how next-generation atomic clocks at different locations could be linked wirelessly to improve geodesy (altitude mapping), distribution of time and frequency information, satellite navigation, radar arrays and other applications.
Clock signals of this type have previously been transferred by fiber-optic cable, but a wireless channel offers greater flexibility and the eventual possibility of transfer to and from satellites. The stability of the transferred infrared signal matched that of NIST's best experimental atomic clock, which operates at optical frequencies. More information: F.R. Giorgetta, W.C. [1305.0402] Constant Speed Ramps. [1305.0443] Free Fermions on causal sets. 19th Workshop on Nuclear Physics 'Marie and Pierre Curie' - Abstract - Physica Scripta. Chewing gum and helium experiment. There is a YouTube video about an experiment with gum and helium, creating a balloon that can lift a person.
Using the law of hydrostatics, the driving force must be at least equal (as can be seen in a certain part of the video) to the weight of the man with the balloon.. So, P = IReplacing the weights by m g and knowing that we have The mass of the man will be Substituting the values and we obtain and we can drawing the graph mH = mH(R) We have, for a mass exceeding 65 kg, the diameter of the balloon will be greater than 5 m. The person has a high less than 2 m, the diameter of the ballon is much less than 2 m.So the video was fake.Versão portuguesa. What happened to antimatter? - Rolf Landua. Do you remember the antimatter bomb in the DaVinci's Code movie? In my journey at CERN, Rolf Landua gave a lecture about antimatter.
Basically the topics in the lecture was this questions: What is it? Where is it create? How can be created? In particle physics, antimatter is material composed of antiparticles, which have the same mass as particles of ordinary matter but have opposite charge and quantum spin. At this time, the apparent asymmetry of matter and antimatter in the visible universe is one of the greatest unsolved problems in physics. Antimatter is created in the LHC, and the LHCb is the detector responsible to detect particles in the antiprotons' collisions. This antimatter cannot be used as energy or weapon because we need energy to create it. But, antimatter is used in our body for PET scan detection. The next step that scientist at CERN are trying to develop is to use positrons and antiprotons as therapy in some deceases. References: Processing LHC Data | Physics. Elementary Particle. Experimental. Untitled. Experimental Particle Physics [PDF 37p] | Download book.
Courier Volume 53, Number 4, May 2013 - CERN Document Server. The Physics of Fred Flintstone’s Flaming Feet | Guest Blog. I hope that the father of the “modern Stone Age family” has thick skin, or else he is going to lose his legs. Let’s put aside the fact that Fred Flintstone basically runs to work and therefore doesn’t really need his wheels (or that he would need the quads of a god to get them moving). What is much more interesting is the way he stops his caveman car. With heels screeching and smoking, Fred famously uses his own feet to stop his forward momentum. Much like how your car’s brake pads work, Fred’s feet absorb all the frictional forces until the stones stop rolling. But just how much force would his feet need to apply, and what would happen to them? Friction’s Victory Over DaFeet The coefficient of friction—a ratio of the force friction provides and the weight pressing down on a surface—is the first thing we would have to find.
Heavy loads encounter more friction, so next we have to estimate the weight of Fred’s famous rockmobile (replicas are for sale, by the way). The Art of. Smart Tools. Smart Tools® est l'ensemble complet de 6 applis individuelles. Il a 6 jeux pour un total de 15 outils. En un mot, tout-en-un. Set 1. Smart Ruler Pro : longueur, angle, pente, niveau, fil Set 2. Smart Measure Pro : distance, hauteur, largeur, aire Set 3. Set 4. Set 5. Set 6. Pour plus d'informations, regardez YouTube et visitez le blog: J'espère que mes applications vous seront utiles dans votre Vie SMART. ★★ Le deuxième package (Smart Tools 2) vient d'être publié.
. * Il s'agit d'un paiement unique. ** Cette application ne pas compatible avec les appareils qui n'ont pas un capteur de boussole (par exemple Moto G4, Galaxy J, Galaxy TabA ...). ** Support hors ligne: Vous pouvez ouvrir cette application sans aucune connexion. ** Cette application ne supporte pas carte et les taux de change en raison de l'absence d'Internet.
AndroSensor. AndroSensor is the absolute all-in-one diagnostic tool that lets you know virtually everything about your device's status. ** If you get error -24 on update, please uninstall and reinstall to fix it ** AndroSensor supports all the sensors an android device can have and it will tell you which of them are not supported by your hardware.
View in a single screen the data from all device's sensors in real time. Graphical and text output available for each sensor (graphs are not available for proximity, location and battery info).- location, location provider, accuracy, altitude, speed and GPS NMEA data.- Google maps to show the above info. To start recording sensor data, just swipe your finger to the right to reveal AndroSensor QuickBar and tap the record button (see screenshots) --- Important Notes ---** All permissions required by the app are explained in app's website along with a detailed changelog. *Google only allows publishers from certain countries to publish paid apps. *** Thank you! The Art of. #Physics notes. | Physics. Graphene and graphExeter combine to create a ne...
How Physics Can Help Solve Crimes - Popular Sci... How Physics Can Help Solve Crimes - Popular Sci... The Art of Physics: Winning Photos of Giant Par... The Art of Physics: Winning Photos of Giant Par... If you need some. If you need some. Hangout with CERN and the Google Science Fair: Why does antimatter matter? Eufisica: How does an atom-smashing particle ac... Protons and Neutrons: The Massive Pandemonium in Matter. Matt Strassler [April 15, 2013] At the center of every atom lies its nucleus, a tiny collection of particles called protons and neutrons. In this article we’ll explore the nature of those protons and neutrons, which are made from yet smaller particles, called quarks, gluons, and anti-quarks (the anti-particles of quarks.)
(Gluons, like photons, are their own anti-particles). Quarks and gluons, for all we know today, may be truly elementary (i.e. indivisible and not made from anything smaller). Strikingly, protons and neutrons have almost the same mass — to within a fraction of a percent: 0.93827 GeV/c2 for a proton,0.93957 GeV/c2 for a neutron. This is a clue to their nature: for they are, indeed, very similar. Because they are so similar, and because they are the particles out of which nuclei are made, protons and neutrons are often collectively called “nucleons”. It is much more difficult to describe nucleons than it is to describe atoms or nuclei. The First Layer of Understanding Ok. The truth of. Composite Weak. [1304.3225] Composite Weak Bosons and Dark Matter. [1304.3253] Variations on Birkhoff's theorem. It’ll take a lot more than AMS to find Da... Inflation, Dark Energy, and the Physics of Spac... Jacobs Physics: Experiment: photogate to measur...
Pushing a Fullerene through a Nanotube. +Enlarge image F. L. Bowles/Univ. of California, Davis Fullerenes are large molecular cages built entirely of carbon atoms, and researchers have been able to modify their properties by trapping other atoms inside the cage. Writing in Physical Review Letters, two theorists offer an analysis of a more recent invention, a fullerene containing a single molecule of water. They show that it responds in a surprising way to an electric field, allowing the whole structure to be driven in either direction through a narrow channel. Although it’s not completely clear why an object with no net charge should respond in this way, the researchers suggest that their discovery could have practical applications, such as delivering drugs by guiding molecules that carry them.
The most-studied fullerene is , a roughly spherical molecular shell made of carbon atoms. Baoxing Xu and Xi Chen of Columbia University in New York City have now used computer simulations to explore the properties of this structure. [1304.3195] Rare Decays of K and B Mesons Revisited. Physics Week in Review: April 13, 2013 | Cocktail Party Physics. “The annals of theoretical biology are clogged with mathematical models that can be ignored or, when tested, fail.” Biologist E.O. Wilson set off a mini-firestorm with an op-ed in the Wall Street Journal topped by a provocative headline claiming “Great scientists don’t need math.” The actual text was a bit more nuanced than that; Wilson’s main point, supporters say, was to encourage students not to be discouraged from pursuing a career in science just because they struggle with math.
Stepping up to the plate to bat for Wilson’s team, Ashutosh Jogalekar wrote, “In many fields math is a powerful tool, but only a tool nonetheless; what matters is a physical feel for the systems to which it is applied.” Others didn’t see it this way, most notably Berkeley mathematics professor Edward Frenkel, who wrote an impassioned response for Slate. This week saw the passing of former British prime minister Margaret Thatcher — a polarizing figure, needless to say.
FLUIDIC. What is Quantum. What is Quantum Physics? Video. Quantum physics is the branch of physics that deals with matter and energy working on an atomic and subatomic level. This About.com video will go over some key concepts of quantum physics.See Transcript Hi, I'm John for About.com. Today I am going to be highlighting some of the key concepts of quantum physics.
Meaning of Quantum Physics Quantum Physics is the branch of physics concerned with the principles that describe the interaction of matter and energy on the atomic and subatomic levels. The term "quantum mechanics" was coined by Max Born in 1924, and derives from the Latin quanta, meaning "how much. " J.J. Some important historical figures and concepts of quantum mechanics are: Wave-Particle Duality Wave-particle duality is the principle that states that matter and light can act as either waves or particles depending on the circumstance of its observation. Heisenberg's Uncertainty Principle Max Planck Albert Einstein Schrodinger Thank you for watching. Overview of Kepler's Laws of Planetary Motion Video. Johannes Kepler was an astronomer who developed three laws explaining how the planets move through space. This video from About.com will go over Kepler's Laws of Planetary Motion.See Transcript My name is James Lincoln.
I'm a physics teacher here for About.com. Kepler's Background Johannes Kepler was a German mathematician and astronomer, and contemporary and correspondent of Galileo. He worked for Tycho Brahe, who wanted him to prove that the orbits of the planets were circles. This didn't work out; the orbits of the planets were not circles. Kepler's 1st Law of Planetary Motion Kepler showed that they were ellipses, that is, planets go around the sun in the shape of an ellipse. Kepler's 2nd Law of Planetary Motion And he also noticed that when it was closer to the sun, it travelled faster. Kepler's 3rd Law of Planetary Motion Kepler, being a mathematician, also noticed a very unusual phenomenon. Kepler didn't know why these things were true.
I'm James Lincoln for About.com. A Year-Long Search for Dark Matter. Clues to the nature of dark matter could come from evidence that high-energy neutrinos are produced in the Sun. The neutrinos, according to certain dark matter theories, would result from particles called WIMPs (weakly interacting massive particles) becoming trapped by the Sun’s gravitational field and annihilating with each other. Now, the collaboration running the world’s largest neutrino telescope, the IceCube experiment at the South Pole, reports in Physical Review Letters its most comprehensive search to date for the predicted neutrinos.
IceCube consists of optical detectors suspended on “strings,” each of which is buried deep in the Antarctic ice. Although neutrinos are infamously difficult to detect because they interact only weakly with matter, a few collide with the nuclei in the ice surrounding the detectors, generating relativistic particles that produce flashes of light (Cherenkov radiation). Swimming into the Light. Physics week. Please login - Educator.com. Astrophysicists Turn to the Skies to Measure the Mass of the Neutrino. An Atom in the Universe. “The atoms come into my brain, dance a dance, and then go out – there are always new atoms, but always doing the same dance, remembering what the dance was yesterday.” -Richard Feynman Here you are, a human being, a grand Universe of atoms that have organized themselves into simple monomers, assembled together into giant macromolecules, which in turn comprise the organelles that make up your cells.
And here you are, a collection of around 75 trillion specialized cells, organized in such a way as to make up you. Image credit: J. Roche at Ohio University. But at your core, you are still just atoms. A mind-bogglingly large number of atoms — some 1028 of them — but atoms nonetheless. Image credit: Ed Uthman. Those two things — you and an atom — may seem so different in scale and size that it’s hard to wrap your head around.
Image credit: Superb Wallpapers, via But that’s just for perspective. Yes, back then it was too hot to have any atoms at all. Egg_drop. The Physics of Sunsets. “It does no harm to the romance of the sunset to know a little bit about it.” -Carl Sagan I would argue the exact opposite, in fact: the beauty of a sunset, in all of its varieties and variations, is only enhanced the more you know about it. Image credit: Dan Schroeder, via Picasa. The next time you watch the Sun descend through the sky, towards the horizon, you might marvel at how the Sun remains the same size all the way down. At just slightly over half-a-degree, the Sun appears to drop at a constant rate throughout the afternoon and into early evening.
But there are some small changes that are extremely important if you want to understand the beauty behind the sunset. Image credit: Tamas Ladanyi (TWAN), over Lake Balaton, Hungary. The first and most obvious is the change in coloration of the Sun, as well as a severe drop in the Sun’s brightness. Image credit: Bob King of Image credit: Pete Lawrence (Digital-Astronomy). Image credit: R Nave of Hyperphysics. Working at CERN - Sixty Symbols. Os livros que grudam sem cola.
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