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Physics. Metaphysics. Tesla. Physics. String Theory (Dimentions) My String Theory. String theory. Quantum Stuff. Science. Quantum mechanics. Physics and Astronomy. 8 Ways Magnetic Levitation Could Shape the Future - How Maglev Technology Works. For years, NASA has been researching the possibility of using the high speeds of maglev transportation to fling spacecraft into low Earth orbit.

"It would really open up space to human exploration and commercialization," Powell says. "It's something we can't do now because it's too expensive. " Powell and his colleagues have proposed two generations of space launching technology. The first is a cargo-only launch track that could be built into a mountainside to reach a height of 20,000 feet. And that's just the first generation. 100 Incredible Lectures from the World's Top Scientists. Posted on Thursday June 18, 2009 by Staff Writers By Sarah Russel Unless you’re enrolled at one of the best online colleges or are an elite member of the science and engineering inner circle, you’re probably left out of most of the exciting research explored by the world’s greatest scientists.

But thanks to the Internet and the generosity of many universities and online colleges, you’ve now got access to the cutting edge theories and projects that are changing the world in this list below. If you’re looking for even more amazing lectures, check out our updated list for 2012 with more talks from great minds.

General Let the world’s top scientists explain exactly how they do their job when you listen to these lectures. Science and Engineering From materials science to the study of thermodynamics, learn more about the science of engineering here. WTC Lecture – collapse of WTC Buildings: Steven E. Biology and Medicine Chemistry Physics and Astronomy Earth and Environment Technology Science and Business. MAKE HOMEMADE SCIENCE TOYS AND PROJECTS. People.

Perpetual Futility A short history of the search for perpetual motion. by Donald E. Simanek Popular histories too often present perpetual motion machines as "freaks and curiosities" of engineering without telling us just how they were understood at the time. They also fail to inform us that even in the earliest history of science and engineering, many persons were able to see the futility and folly of attempts to achieve perpetual motion. Sometimes a particular device comes to us with a label, such as "Bishop Wilkins' magnetic perpetual motion machine. " Bhaskara's Wheels. Villard de Honnecourt was born in the late 12th century and probably lived and worked in the north of France from 1225 to 1250. The most celebrated of his machine designs was for a perpetual motion wheel.

Many a time have skilful workmen tried to contrive a wheel that should turn of itself; here is a way to make such a one, by means of an uneven number of mallets, or by quicksilver (mercury). Mark Anthony Zimara (1460? Relativity of Electric and Magnetic Fields. Previous home next Michael Fowler, University of Virginia A Magnetic Puzzle… Suppose we have an infinitely long straight wire, having a charge density of electrons of coulombs per meter, all moving at speed to the right (recall typical speeds are centimeters per minute) and a neutralizing fixed background of positive charge, also of course coulombs per meter. The current in the wire has magnitude (and actually is flowing to the left, since the moving electrons carry negative charge). Suppose also that a positive charge is outside the wire, a distance from the axis, and this outside charge is moving at the same exact velocity as the electrons in the wire. What force does the positive charge feel? The wire is electrically neutral, since it contains equal densities of positive and negative charges, both uniformly distributed throughout the wire (the illustration above is of course schematic).

However, since is moving, it will feel a magnetic force, so the force on the charge is of magnitude. Sonoluminescence. Single-bubble sonoluminescence - A single, cavitating bubble. Video of synthetic wound cavity collapsing creating sonoluminescence. Long exposure image of multi-bubble sonoluminescence created by a high-intensity ultrasonic horn immersed in a beaker of liquid History[edit] The sonoluminescence effect was first discovered at the University of Cologne in 1934 as a result of work on sonar. In 1989 an experimental advance was introduced by Felipe Gaitan and Lawrence Crum, who produced stable single-bubble sonoluminescence (SBSL). Properties[edit] Sonoluminescence can occur when a sound wave of sufficient intensity induces a gaseous cavity within a liquid to collapse quickly.

Some facts about sonoluminescence: Rayleigh–Plesset equation[edit] The dynamics of the motion of the bubble is characterized to a first approximation by the Rayleigh-Plesset equation (named after Lord Rayleigh and Milton Plesset): Mechanism of phenomenon[edit] In 2002, M. Other proposals[edit] Quantum explanations[edit] [edit] A Review of the Universe. The laws list. Brief Answers to Cosmic Questions.

Structure of the Universe Does the Universe have an edge, beyond which there is nothing? Are the galaxies arranged on the surface of a sphere? Why can't we see the whole universe? Does the term "universe" refer to space, or to the matter in it, or to both? Evolution of the Universe Did the Universe expand from a point? More about the Big Bang When they say "the universe is expanding," what exactly is expanding? Structure of the Universe Does the Universe have an edge, beyond which there is nothing? Are the galaxies arranged on the surface of a sphere? Why can't we see the whole universe? If you could suddenly freeze time everywhere in the universe, and magically survey all of creation, you would find galaxies extending out far beyond what we can see today. Does the term "universe" refer to space, or to the matter in it, or to both? Today, the situation is reversed. Discovering the properties of space remains one of the deepest and most important problems in modern science.

Physicscentral. Athene's Theory of Everything. Radical New Theory: "Our Universe may be the interior of a black hole existing in another universe” “Our own Universe may be the interior of a black hole existing in another universe.” In a remarkable paper about the nature of space and the origin of time, Nikodem Poplawski, a physicist at Indiana University, suggests that a small change to the theory of gravity implies that our universe inherited its arrow of time from the black hole in which it was born.

Poplawski says that the idea that black holes are the cosmic mothers of new universes is a natural consequence of a simple new assumption about the nature of spacetime. Poplawski points out that the standard derivation of general relativity takes no account of the intrinsic momentum of spin half particles. However there is another version of the theory, called the Einstein-Cartan-Kibble-Sciama theory of gravity, which does. This theory predicts that particles with half integer spin should interact, generating a tiny repulsive force called torsion. In ordinary circumstances, torsion is too small to have any effect. TOP TEN UNSOLVED PROBLEMS IN PHYSICS.