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Physical : (a) of or relating to physics (b) characterized or produced by the forces and operations of physics (c) having material existence : perceptible especially through the senses and subject to the laws of nature — Webster

OneLook, Free Dictionary, Wiktionary, Urban Dictionary

Realm : kingdom, sphere, domain — Webster

OneLook, Free Dictionary, Wiktionary, Urban Dictionary

Physical Realm : kingdom, sphere, or domain of things that have material existence and are perceptible, especially those things perceptible through the senses and subject to the laws of nature — M.E.Hopper

Encyclopedia

Physical universe In religion and esotericism, the term “physical universe” or “material universe” is used to distinguish the physical matter of the universe from a proposed spiritual or supernatural essence. — Wikipedia

Eric Weisstein’s World of Physics (ScienceWorld, Wolfram Research)
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Physical science is a branch of natural science that studies non-living systems, in contrast to life science. It in turn has many branches, each referred to as a “physical science”, together called the “physical sciences”. However, the term physical creates an unintended, somewhat arbitrary distinction, since many branches of physical science also study biological phenomena and branches of chemistry, such as organic chemistry. — Wikipedia

Encyclopædia Britannica

Physics is the natural science that studies matter and its motion and behavior through space and time and that studies the related entities of energy and force. Physics is one of the most fundamental scientific disciplines, and its main goal is to understand how the universe behaves. — Wikipedia

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What if?

What If? Answering your hypothetical questions with physics, every Tuesday.

  • Earth-Moon Fire Pole
    by xkcd on May 21, 2018 at 12:00 am

    <article class="entry"> <a href="//what-if.xkcd.com/157/"><h1>Earth-Moon Fire Pole</h1></a> <p id="question">My son (5y) asked me today: If there were a kind of a fireman&#39;s pole from the Moon down to the Earth, how long would it take to slide all the way from the Moon to the Earth?</p> <p id="attribute">Ramon Schönborn, Germany</p> <p>First, let&#39;s get a few things out of the […]

  • Electrofishing for Whales
    by xkcd on March 9, 2017 at 12:00 am

    <article class="entry"> <a href="//what-if.xkcd.com/156/"><h1>Electrofishing for Whales</h1></a> <p id="question">I used to work on a fisheries crew where we would use an electro-fisher backpack to momentarily stun small fish (30 - 100 mm length) so we could scoop them up with nets to identify and measure them. The larger fish tended to be stunned for slightly longer because of their larger surface area but I don&#39;t […]

  • Toaster vs. Freezer
    by xkcd on February 28, 2017 at 12:00 am

    <article class="entry"> <a href="//what-if.xkcd.com/155/"><h1>Toaster vs. Freezer</h1></a> <p id="question">Would a toaster still work in a freezer?</p> <p id="attribute">—<a href="http://www.maximumfun.org/shows/my-brother-my-brother-and-me">My Brother, My Brother and Me</a>, <a […]

  • Coast-to-Coast Coasting
    by xkcd on February 8, 2017 at 12:00 am

    <article class="entry"> <a href="//what-if.xkcd.com/154/"><h1>Coast-to-Coast Coasting</h1></a> <p id="question">What if the entire continental US was on a decreasing slope from West to East. How steep would the slope have to be to sustain the momentum needed to ride a bicycle the entire distance without pedaling?</p> <p id="attribute">—Brandon Rooks</p> <p>Too steep to actually build, […]

  • Hide the Atmosphere
    by xkcd on January 30, 2016 at 12:00 am

    <article class="entry"> <a href="//what-if.xkcd.com/153/"><h1>Hide the Atmosphere</h1></a> <p id="question">Earth’s atmosphere is really thin compared to the radius of the Earth. How big a hole do I need to dig before people suffocate?</p> <p id="attribute">—Sam Burke</p> <p>The idea here is straightforward: When you dig a hole in the ground, the hole fills up with air.<span […]

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EurekAlert! - Chemistry, Physics and Materials Sciences The premier online source for science news since 1996. A service of the American Association for the Advancement of Science.

  • Scientists turn carbon emissions into usable...
    on January 19, 2019 at 5:00 am

    (Ulsan National Institute of Science and Technology(UNIST)) A recent study, affiliated with South Korea's Ulsan National Institute of Science and Technology (UNIST) has introduced a system that turn carbon emissions into usable energy. […]

  • A new low-latency congestion control for cellular...
    on January 19, 2019 at 5:00 am

    (Ulsan National Institute of Science and Technology(UNIST)) A recent study, affiliated with South Korea's Ulsan National Institute of Science and Technology (UNIST) has proposed a novel technique that can reduce the congestion issues in the network environment. […]

  • New class of solar cells, using lead-free...
    on January 19, 2019 at 5:00 am

    (Ulsan National Institute of Science and Technology(UNIST)) A recent study, affiliated with South Korea's Ulsan National Institute of Science and Technology (UNIST) has presented a new class of solar cells, using lead-free perovskite materials. […]

  • Smart microrobots that can adapt to their...
    on January 18, 2019 at 5:00 am

    (Ecole Polytechnique Fédérale de Lausanne) Scientists at EPFL and ETH Zurich have developed tiny elastic robots that can change shape depending on their surroundings. Modeled after bacteria and fully biocompatible, these robots optimize their movements so as to get to hard-to-reach areas of the human body. They stand to revolutionize targeted drug delivery. […]

  • Enhanced NMR reveals chemical structures in a...
    on January 18, 2019 at 5:00 am

    (Massachusetts Institute of Technology) MIT researchers have developed a way to dramatically enhance the sensitivity of nuclear magnetic resonance spectroscopy (NMR), a technique used to study the structure and composition of many kinds of molecules, including proteins linked to Alzheimer's and other diseases. […]

  • Musculoskeletal and rheumatic diseases induced by...
    on January 18, 2019 at 5:00 am

    (Bentham Science Publishers) Immune checkpoint inhibitors are a new promising class of antitumor drugs that have been associated with a number of immune-related Adverse Events (AEs), including musculoskeletal and rheumatic disease. […]

  • Nerve growth factor: Early studies and recent...
    on January 18, 2019 at 5:00 am

    (Bentham Science Publishers) NGF is the first discovered member of a family of neurotrophic factors, collectively indicated as neurotrophins, (which include brain-derived neurotrophic factor, neurotrophin-3 and neurotrophin 4/5). NGF was discovered for its action on the survival and differentiation of selected populations of peripheral neurons. […]

  • Untargeted metabolomics for atherosclerotic...
    on January 18, 2019 at 5:00 am

    (Bentham Science Publishers) Cardiovascular Disease (CVD) is the leading cause of mortality and morbidity worldwide. Four out of five CVD deaths are due to myocardial infarction or stroke. Despite many initiatives that have been established for CVD prevention and risk management, and new therapies to treat existing CVD, patients continue to die from cardiac events. […]

  • UNIST professor honored with '2018 National Top...
    on January 18, 2019 at 5:00 am

    (Ulsan National Institute of Science and Technology(UNIST)) Recent work by Professor Eunmi Choi at South Korea's Ulsan National Institute of Science and Technology (UNIST) has been honored with '2018 National Top 12 R&D Performance'. […]

  • Plant peptide helps roots to branch out in the...
    on January 18, 2019 at 5:00 am

    (Kobe University) How do plants space out their roots? A Japanese research team has identified a peptide and its receptor that help lateral roots to grow with the right spacing. The findings were published on Dec. 20, 2018 in the online edition of Developmental Cell. […]


Physics News - Physics News, Material Sciences, Science News, Physics Physorg.com provides the latest news on physics, materials, nanotech, science and technology. Updated Daily.

  • Classic double-slit experiment in a new light
    on January 18, 2019 at 7:00 pm

    An international research team led by physicists from the University of Cologne has implemented a new variant of the basic double-slit experiment using resonant inelastic X-ray scattering at the European Synchrotron ESRF in Grenoble. This new variant offers a deeper understanding of the electronic structure of solids. Writing in Science Advances, the research group have now presented their results in a study titled "Resonant inelastic X-ray incarnation of Young's double-slit experiment." […]

  • Enhanced NMR reveals chemical structures in a...
    on January 18, 2019 at 7:00 pm

    MIT researchers have developed a way to dramatically enhance the sensitivity of nuclear magnetic resonance spectroscopy (NMR), a technique used to study the structure and composition of many kinds of molecules, including proteins linked to Alzheimer's and other diseases. […]

  • New thermoelectric material delivers record...
    on January 17, 2019 at 7:47 pm

    Taking advantage of recent advances in using theoretical calculations to predict the properties of new materials, researchers reported Thursday the discovery of a new class of half-Heusler thermoelectric compounds, including one with a record high figure of merit—a metric used to determine how efficiently a thermoelectric material can convert heat to electricity. […]

  • Physicists show quantum materials can be tuned...
    on January 17, 2019 at 11:00 am

    Some iron-based superconductors could benefit from a tuneup, according to two studies by Rice University physicists and collaborators. […]

  • Zirconium isotope a master at neutron capture
    on January 17, 2019 at 9:56 am

    The probability that a nucleus will absorb a neutron is important to many areas of nuclear science, including the production of elements in the cosmos, reactor performance, nuclear medicine and defense applications. […]

  • Novel material converts infrared light into...
    on January 16, 2019 at 6:00 pm

    Columbia University scientists, in collaboration with researchers from Harvard, have succeeded in developing a chemical process to absorb infrared light and re-emit it as visible energy, allowing innocuous radiation to penetrate living tissue and other materials without the damage caused by high-intensity light exposure. […]

  • Fiery sighting: A new physics of eruptions that...
    on January 16, 2019 at 5:22 pm

    Sudden bursts of heat that can damage the inner walls of tokamak fusion experiments are a hurdle that operators of the facilities must overcome. Such bursts, called "edge localized modes (ELMs)," occur in doughnut-shaped tokamak devices that house the hot, charged plasma that is used to replicate on Earth the power that drives the sun and other stars. Now researchers at the U.S. Department of Energy's (DOE) Princeton Plasma Physics Laboratory (PPPL) have directly observed a possible and […]

  • Simple rules predict and explain biological...
    on January 16, 2019 at 4:14 pm

    Scientists have long employed relatively simple guidelines to help explain the physical world, from Newton's second law of motion to the laws of thermodynamics. […]

  • Understanding insulators with conducting edges
    on January 16, 2019 at 2:42 pm

    Insulators that are conducting at their edges hold promise for interesting technological applications. However, until now their characteristics have not been fully understood. Physicists at Goethe University have now modelled what are known as topological insulators with the help of ultracold quantum gases. In the current issue of Physical Review Letters, they demonstrate how the edge states could be experimentally detected. […]

  • New quantum structures in super-chilled helium...
    on January 16, 2019 at 1:03 pm

    For the first time, researchers have documented the long-predicted occurrence of 'walls bound by strings' in superfluid helium-3. The existence of such an object, originally foreseen by cosmology theorists, may help explaining how the universe cooled down after the Big Bang. With the newfound ability to recreate these structures in the lab, earth-based scientists finally have a way to study some of the possible scenarios that might have taken place in the early universe more closely. […]


Nature Physics - Issue - nature.com science feeds Nature Physics offers a unique mix of news and reviews alongside top-quality research papers. Published monthly, in print and online, the journal reflects the entire spectrum of physics, pure and applied.

  • Topological marker currents in Chern insulators
    by M. D. Caio on January 14, 2019 at 12:00 am

    Topological marker currents in Chern insulatorsTopological marker currents in Chern insulators, Published online: 14 January 2019; doi:10.1038/s41567-018-0390-7While topological states are often characterized by their global properties related to the topological invariants, the introduced real-space topological markers provide new insights to these states. […]

  • Publisher Correction: High-harmonic generation...
    by Shambhu Ghimire on January 14, 2019 at 12:00 am

    Publisher Correction: High-harmonic generation from solidsPublisher Correction: High-harmonic generation from solids, Published online: 14 January 2019; doi:10.1038/s41567-019-0421-zPublisher Correction: High-harmonic generation from solids […]

  • Direct observation of ion acceleration from a...
    by R. M. Magee on January 14, 2019 at 12:00 am

    Direct observation of ion acceleration from a beam-driven wave in a magnetic fusion experimentDirect observation of ion acceleration from a beam-driven wave in a magnetic fusion experiment, Published online: 14 January 2019; doi:10.1038/s41567-018-0389-0A major challenge for achieving useful thermonuclear fusion regimes is heating plasma to reactive temperature conditions. It is demonstrated experimentally how energetic ions, generated via neutral beam injection, can be exploited for this […]

  • Highly efficient double ionization of mixed...
    by A. C. LaForge on January 7, 2019 at 12:00 am

    Highly efficient double ionization of mixed alkali dimers by intermolecular Coulombic decayHighly efficient double ionization of mixed alkali dimers by intermolecular Coulombic decay, Published online: 07 January 2019; doi:10.1038/s41567-018-0376-5Using alkali metal dimers attached to helium droplets, a new decay mechanism for intermolecular Coulombic decay is demonstrated. The process leads to previously unresolved double ionization for excitation energies exceeding double ionization energies. […]

  • Quantum interference in second-harmonic...
    by Kai-Qiang Lin on January 7, 2019 at 12:00 am

    Quantum interference in second-harmonic generation from monolayer WSe2Quantum interference in second-harmonic generation from monolayer WSe<sub>2</sub>, Published online: 07 January 2019; doi:10.1038/s41567-018-0384-5Quantum interference between electronic pathways is generally difficult to observe in solid-state systems. Such interference is, however, now characterized in the second-harmonic generation from transition metal dichalcogenides, even at room temperature. […]

  • Microwave amplification
    by David Abergel on January 2, 2019 at 12:00 am

    Microwave amplificationMicrowave amplification, Published online: 02 January 2019; doi:10.1038/s41567-018-0396-1Microwave amplification […]

  • Dark energy in doubt
    by Stefanie Reichert on January 2, 2019 at 12:00 am

    Dark energy in doubtDark energy in doubt, Published online: 02 January 2019; doi:10.1038/s41567-018-0398-zDark energy in doubt […]

  • Biological transitions
    by Mark Buchanan on January 2, 2019 at 12:00 am

    Biological transitionsBiological transitions, Published online: 02 January 2019; doi:10.1038/s41567-018-0393-4Biological transitions […]


physicsworld.com: news Latest news from physicsworld.com



    Matter & Energy News -- ScienceDaily Detectors and electronics. Learn about every sort of detector, radar system and more from leading research institutes around the world.

    • Using bacteria to create a water filter that...
      on January 18, 2019 at 7:55 pm

      Engineers have created a bacteria-filtering membrane using graphene oxide and bacterial nanocellulose. It's highly efficient, long-lasting and environmentally friendly -- and could provide clean water for those in need. […]

    • Enhanced NMR reveals chemical structures in a...
      on January 18, 2019 at 7:55 pm

      Researchers have developed a way to dramatically enhance the sensitivity of nuclear magnetic resonance spectroscopy (NMR), a technique used to study the structure and composition of many kinds of molecules, including proteins linked to Alzheimer's and other diseases. […]

    • Smart microrobots that can adapt to their...
      on January 18, 2019 at 7:55 pm

      Scientists have developed tiny elastic robots that can change shape depending on their surroundings. Modeled after bacteria and fully biocompatible, these robots optimize their movements so as to get to hard-to-reach areas of the human body. They stand to revolutionize targeted drug delivery. […]

    • Classic double-slit experiment in a new light
      on January 18, 2019 at 7:55 pm

      An international research group has developed a new X-ray spectroscopy method based on the classical double-slit experiment to gain new insights into the physical properties of solids. […]

    • New ways to harness wasted methane
      on January 18, 2019 at 4:08 pm

      The primary component of natural gas, methane, is itself a potent greenhouse gas. A recent study has unveiled a high performance catalyst for methane conversion to formaldehyde. […]

    • New thermoelectric material delivers record...
      on January 17, 2019 at 7:21 pm

      Taking advantage of recent advances in using theoretical calculations to predict the properties of new materials, researchers have discovered a new class of half-Heusler thermoelectric compounds, including one with a record high figure of merit -- a metric used to determine how efficiently a thermoelectric material can convert heat to electricity. […]

    • Stress fracture? Your foot hitting pavement...
      on January 17, 2019 at 7:20 pm

      It starts as a persistent and irritating pain in the foot or lower leg, then it gets more intense, maybe with swelling, and soon a runner knows she's being sidelined by one of the most common running injuries: a stress fracture. These tiny cracks in the bone can halt training for months or even end a sports season. A segment of the multibillion-dollar wearables industry aims to save potential victims from this fate, but an engineering professor found a major problem: the devices are measuring […]

    • Reinforcement learning expedites 'tuning' of...
      on January 17, 2019 at 7:20 pm

      Researchers have developed an intelligent system for 'tuning' powered prosthetic knees, allowing patients to walk comfortably with the prosthetic device in minutes, rather than the hours necessary if the device is tuned by a trained clinical practitioner. The system is the first to rely solely on reinforcement learning to tune the robotic prosthesis. […]

    • How molecules teeter in a laser field
      on January 17, 2019 at 4:33 pm

      When molecules interact with the oscillating field of a laser, an instantaneous, time-dependent dipole is induced. This very general effect underlies diverse physical phenomena. Now scientists report on an experiment where the dependence of the driven-dipole response on the bound state of an electron in a methyl iodine molecule is revealed. […]

    • Blister fluid could help diagnose burn severity
      on January 17, 2019 at 4:33 pm

      Severe burns can leave physical and psychological scars, especially in children. When a burn patient enters the clinic, doctors use factors such as the depth and size of the burn, as well as the time required for skin healing -- or re-epithelialization -- to determine the best course of treatment. Now, researchers have found another, possibly more accurate way to classify burn severity: analyzing proteins in blister fluid. […]