Latest Introductory physics Stories

2012-07-18 18:27:32

Lee Rannals for redOrbit.com - Your Universe Online The U.S. Naval Research Laboratory Spacecraft Engineering Department's space robotics research facility has gotten its hands on a tool to help emulate inertia in space. The 75,000 pound Gravity Offset Table (GOT) is made from a single slab of solid granite, and will help emulate the mechanics of physics found in space. The frictionless large surface area will allow researchers to replicate the effects of inertia on man-made objects...

By Harnessing Friction Between Surfaces, Triboelectric Generator Produces Electricity
2012-07-10 10:51:47

Polymer power Researchers have discovered yet another way to harvest small amounts of electricity from motion in the world around us — this time by capturing the electrical charge produced when two different kinds of plastic materials rub against one another. Based on flexible polymer materials, this "triboelectric" generator could provide alternating current (AC) from activities such as walking. The triboelectric generator could supplement power produced by nanogenerators that...

2012-06-04 23:02:42

Isotech Inc., has introduced a new line of lightweight, non-magnetic linear ball slides designed for motion applications that are sensitive to magnetic influence. From sensitive electronics, medical equipment, and semiconductor, to liquid crystal manufacturing and inspection equipment, the applications for non-magnetic linear ball slides are numerous. Hatfield, PA (PRWEB) June 04, 2012 Isotech Inc., a supplier of precision linear motion products, has introduced a new line of lightweight,...

2012-05-29 08:10:41

Friction is a key phenomenon in applied physics, whose origin has been studied for centuries. Until now, it has been understood that mechanical wear-resistance and fluid lubrication affect friction, but the fundamental origin of sliding friction has been unknown. Dr. Lasse Makkonen, Principal Scientist at VTT Technical Research Centre of Finland, has now presented an explanation for the origin of sliding friction between solid objects. According to his theory, the amount of friction depends...

2012-02-01 09:55:13

On Earth all biology is subjected to gravity. Some biological systems require gravity for correct orientation (geotropism: plants grow up, roots grow down). In the absence of gravity even human biology is affected: astronauts lose bone density at 1-2% a month rather than the usual 1-2% a year on Earth. But the effects of gravity on cellular processes are less well understood. New research published in BioMed Central's open access journal BMC Genomics has used diamagnetic levitation to...

2012-01-11 15:19:31

Similar to the way pavement, softened by a hot sun, will slow down a car, graphene–a one-atom-thick sheet of carbon with wondrous properties–slows down an object sliding across its surface. But stack the sheets and graphene gets more slippery, say theorists at the National Institute of Standards and Technology (NIST), who developed new software to quantify the material's friction. "I don't think anyone expects graphene to behave like a surface of a three-dimensional material,...

2011-12-02 13:20:49

The December GSA TODAY science article, "Unique geologic insights from “non-unique” gravity and magnetic interpretation,” is now online at www.geosociety.org/gsatoday/. All GSA Today articles are open access. In many fields of applied science, such as geology, there are often tensions and disagreements between scientists who specialize in analyses of problems using mathematical models to describe sets of collected data, and those that rely on on-the-ground observations...

2011-04-20 00:00:30

PerpetualGreen's Dynamic EnergySave System increases the effectiveness of all forms of renewable energy by an average of 25%. The Dynamic EnergySave is designed to concurrently integrate several principles of physics, to safely balance the reactive energy of an electrical system to raise the energy efficiency to as close to 98% as possible - at all times. The result is unparalleled efficiency gains coupled with a quick return on investment. Draper, UT (PRWEB) April 18, 2011 PerpetualGreen...

Latest Introductory physics Reference Libraries

2004-10-19 04:45:41

General Relativity -- General Relativity is the common name for the theory of gravitation published by Albert Einstein in 1915. According to general relativity the force of gravity is a manifestation of the local geometry of spacetime. Although the modern theory is due to Einstein, its origins go back to the axioms of Euclidean geometry and the many attempts over the centuries to prove Euclid's fifth postulate, that parallel lines remain always equidistant, culminating with the...

2004-10-19 04:45:41

Escape Velocity -- An escape velocity is the minimum speed at which an object without propulsion can move away from a source of a gravitational field indefinitely if there is no friction. This definition may need modification for the practical problem of two or more sources in some cases. In any case, the object is assumed to be a point with a mass that is negligible compared with that of the source of the field, usually an excellent approximation. It is commonly described as the speed...

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