News tagged with repulsive forces
New Data Suggests We Don’t Live in a Void, and Supports Dark Energy
(PhysOrg.com) -- An alternative proposal to dark energy in which the Earth sits near the center of a large void is undergoing scrutiny, and the results show that void models fit poorly with observed data. ...
Jan 28, 2009 |
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Antigravity could replace dark energy as cause of Universe's expansion
Since the late 20th century, astronomers have been aware of data that suggest the universe is not only expanding, but expanding at an accelerating rate. According to the currently accepted model, this accelerated ...
Apr 18, 2011 |
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Large Hadron Collider could test hyperdrive propulsion
(PhysOrg.com) -- The world's most powerful particle accelerator, the Large Hadron Collider (LHC), could be used to test the principles behind hyperdrive, a possible future form of spacecraft propulsion that could drive spacecraft ...
Oct 09, 2009 |
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Scientists Discover Light Force with 'Push' Power
(PhysOrg.com) -- A team of Yale University researchers has discovered a "repulsive" light force that can be used to control components on silicon microchips, meaning future nanodevices could be controlled ...
Jul 13, 2009 |
4.7 / 5 (26) |
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Surprising discovery: X-rays drive formation of new crystals
detect broken bones, tumors and dental cavities, analyze atoms in diverse materials and screen luggage at airports -- but who knew they could cause crystals to form?
Jan 25, 2010 |
4.7 / 5 (18) |
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Theorists Close In on Improved Atomic Property Predictions
(PhysOrg.com) -- Scientists at the National Institute of Standards and Technology and Indiana University have determined the most accurate values ever for a fundamental property of the element lithium using a novel approach ...
Jan 13, 2010 |
4.6 / 5 (17) |
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Magnetism observed in gas for the first time
(PhysOrg.com) -- For the first time, MIT scientists have observed ferromagnetism in an atomic gas, addressing the decades-old question of whether gases could show properties similar to a magnet made of iron or nickel. Specifically, ...
Sep 17, 2009 |
4.5 / 5 (14) |
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Raising the prospects for quantum levitation
More than half-a-century ago, the Dutch theoretical physicist Hendrik Casimir calculated that two mirrors placed facing each other in a vacuum would attract. The mysterious force arises from the energy of virtual particles ...
Apr 18, 2012 |
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DNA-Based Assembly Line for Nano-Construction of New Biosensors, Solar Cells (w/Video)
(PhysOrg.com) -- Building on the idea of using DNA to link up nanoparticles — particles measuring mere billionths of a meter — scientists at the U.S. Department of Energy’s Brookhaven National Laboratory have ...
Nanotechnology / Nanomaterials
Mar 30, 2009 |
5 / 5 (10) |
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Electric charge disorder: A key to biological order?
Theoretical physicist Ali Naji from the IPM in Tehran and the University of Cambridge, UK, and his colleagues have shown how small random patches of disordered, frozen electric charges can make a difference when they are ...
Apr 30, 2012 |
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Cosmology in a Petri dish
Scientists have found that micron-size particles which are trapped at fluid interfaces exhibit a collective dynamic that is subject to seemingly unrelated governing laws. These laws show a smooth transitioning ...
Jan 26, 2012 |
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Metamaterials could reduce friction in nanomachines
(PhysOrg.com) -- Nanoscale machines expected to have wide application in industry, energy, medicine and other fields may someday operate far more efficiently thanks to important theoretical discoveries concerning the manipulation ...
Nanotechnology / Nanomaterials
Dec 07, 2009 |
4.3 / 5 (6) |
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How not to blow up a molecule
High-charge-state ions in a molecule cause strong Coulomb forces, repulsive forces that try to blow its atoms apart. But the research team's crucial finding was that a way to produce only lower charge states ...
Jun 25, 2010 |
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Researchers heat up gold to surprising effect: It gets harder not softer
Common sense tells us that when you heat something up it gets softer, but a team of researchers, led by University of Toronto chemistry and physics professor R.J. Dwayne Miller, has demonstrated the exact ...
Jan 22, 2009 |
4 / 5 (5) |
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Oxygen molecule survives to enormously high pressures
Using computer simulations, a Ruhr-University Bochum (Germany) researcher has shown that the oxygen molecule (O2) is stable up to pressures of 1.9 terapascal, which is about nineteen million times higher than atmosphere pressure. ...
Jan 30, 2012 |
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