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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

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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

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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.

  • Vine compound starves cancer cells
    on November 16, 2018 at 5:00 am

    (University of Würzburg) Researchers from Würzburg and Toyama have discovered that a compound isolated from tropical rainforest vines inhibits the growth of pancreatic cancer cells in the lab. […]

  • New materials: Growing polymer pelts
    on November 16, 2018 at 5:00 am

    (Karlsruher Institut für Technologie (KIT) ) Polymer pelts made of the finest of fibers are suitable for many different applications, from coatings that adhere well and are easy to remove to highly sensitive biological detectors. Researchers at KIT together with scientists in the United States have now developed a cost-effective process to allow customized polymer nanofibers to grow on a solid substrate through vapor deposition of a liquid crystal layer with reactive molecules. […]

  • Rapid response inpatient education boosts use of...
    on November 16, 2018 at 5:00 am

    (Johns Hopkins Medicine) A new study designed to reach hospitalized patients at risk shows that a 'real-time' educational conversation, video or leaflet can lower the missed dose rates of drugs that can prevent potentially lethal blood clots in their veins. […]

  • A new lead on a 50-year-old radiation damage...
    on November 16, 2018 at 5:00 am

    (University of Michigan) For half a century, researchers have seen loops of displaced atoms appearing inside nuclear reactor steel after exposure to radiation, but no one could work out how. […]

  • Affordable catalyst for CO2 recycling
    on November 16, 2018 at 5:00 am

    (Ruhr-University Bochum) A catalyst for carbon dioxide recycling, Mineral pentlandite may also be a conceivable alternative to expensive precious metal catalysts. This is the result of a study conducted by researchers from Ruhr-Universität Bochum (RUB), Fritz-Haber Institute Berlin and Fraunhofer Umsicht in Oberhausen. Pentlandite had previously been known as a catalyst for hydrogen production. By adding a suitable solvent, the researchers successfully utilised it to convert carbon dioxide […]

  • Newborn babies' brain responses to being touched...
    on November 16, 2018 at 5:00 am

    (University College London) A newborn baby's brain responds to being touched on the face, according to new research co-led by UCL.Babies use this sense of touch -- facial somatosensation -- to find and latch onto their mother's nipple, and should have this ability from birth.Premature babies often have difficulty feeding, and underdevelopment of their facial sensitivity may be one of the main causes. […]

  • New way to look at cell membranes could change...
    on November 16, 2018 at 5:00 am

    (University of Oxford) Researchers have developed a new technique to analyse cell membrane proteins in situ which could revolutionise the way in which we study diseases, such as cancer, metabolic and heart diseases. […]

  • Universal laws in impact dynamics of dust...
    on November 16, 2018 at 5:00 am

    (Nagoya University) A collaboration between Nagoya University and TU Braunschweig finds evidence that when projectiles hit soft clumps of dust or hard clumps of loose glass beads, the scaling laws for energy dissipation and energy transfer are the same in each case. This helps us understand how granular clumps stick together, and how planets are formed. […]

  • Natural constants as the main protagonists
    on November 16, 2018 at 5:00 am

    (Physikalisch-Technische Bundesanstalt (PTB)) On the occasion of their 26th General Conference on Weights and Measures (CGPM) on Nov. 16, 2018, in Versailles, the signatory states of the Metre Convention resolved to fundamentally reform the International System of Units (SI). This resolution stipulates that, in the future, all SI units will be based on the values laid down for seven selected natural constants. […]

  • Geochemist E. Bruce Watson recognized for...
    on November 16, 2018 at 5:00 am

    (Rensselaer Polytechnic Institute) The Mineralogical Society of America (MSA) has recognized E. Bruce Watson, a geochemist and Institute Professor at Rensselaer Polytechnic Institute, with its highest honor, the Roebling Medal, bestowed for scientific eminence in the broad field of mineralogical science. […]


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

  • Take a weight off: Tears, joy as kilo gets...
    on November 16, 2018 at 3:38 pm

    In a historic vote, more than 50 nations unanimously approved an overhaul of the international measurement system that underpins global trade and other human endeavors, uniting Friday behind new definitions for the kilogram and other units in a way they fail to do on many other issues. […]

  • Scientists produce 3-D chemical maps of single...
    on November 16, 2018 at 3:31 pm

    Scientists at the National Synchrotron Light Source II (NSLS-II)—a U.S. Department of Energy (DOE) Office of Science User Facility at DOE's Brookhaven National Laboratory—have used ultrabright x-rays to image single bacteria with higher spatial resolution than ever before. Their work, published in Scientific Reports, demonstrates an X-ray imaging technique, called X-ray fluorescence microscopy (XRF), as an effective approach to produce 3-D images of small biological samples. […]

  • Infinite-dimensional symmetry opens up...
    on November 16, 2018 at 3:00 pm

    The symmetries that govern the world of elementary particles at the most elementary level could be radically different from what has so far been thought. This surprising conclusion emerges from new work published by theoreticians from Warsaw and Potsdam. The scheme they posit unifies all the forces of nature in a way that is consistent with existing observations and anticipates the existence of new particles with unusual properties that may even be present in our close environs. […]

  • Scientists provide first-ever views of elusive...
    on November 15, 2018 at 8:15 pm

    Researchers at the University of New Hampshire have captured a difficult-to-view singular event involving "magnetic reconnection"—the process by which sparse particles and energy around Earth collide producing a quick but mighty explosion—in the Earth's magnetotail, the magnetic environment that trails behind the planet. […]

  • Terahertz laser pulses amplify optical phonons in...
    on November 15, 2018 at 2:50 pm

    A study led by scientists of the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) at the Center for Free-Electron Laser Science in Hamburg/Germany presents evidence of the amplification of optical phonons in a solid by intense terahertz laser pulses. These light bursts excite atomic vibrations to very large amplitudes, where their response to the driving electric field becomes nonlinear and conventional description fails to predict their behavior. […]

  • Designer emulsions
    on November 15, 2018 at 2:20 pm

    ETH material researchers are developing a method with which they can coat droplets with controlled interfacial composition and coverage on demand in an emulsion in order to stabilise them. In doing so they are fulfilling a long-held dream of researchers and industry. […]

  • Research uncovers the spontaneous polarization of...
    on November 15, 2018 at 1:38 pm

    Many materials exhibit new properties when in the form of thin films composed of just a few atomic layers. Most people are familiar with graphene, the two-dimensional form of graphite, but thin film versions of other materials also have the potential to facilitate technological breakthroughs. […]

  • Bursting bubbles launch bacteria from water to air
    on November 15, 2018 at 1:36 pm

    Wherever there's water, there's bound to be bubbles floating at the surface. From standing puddles, lakes, and streams, to swimming pools, hot tubs, public fountains, and toilets, bubbles are ubiquitous, indoors and out. […]

  • Quantum science turns social
    on November 15, 2018 at 12:02 pm

    Researchers in a lab at Aarhus University have developed a versatile remote gaming interface that allowed external experts as well as hundreds of citizen scientists all over the world to optimize a quantum gas experiment through multiplayer collaboration and in real time. The efforts of both teams dramatically improved upon the previous best solutions established after months of careful experimental optimization. Comparing domain experts, algorithms and citizen scientists is a first step […]

  • Stretchable thermoelectric coils for energy...
    on November 14, 2018 at 2:30 pm

    Miniaturized semiconductor devices with energy harvesting features have paved the way to wearable technologies and sensors. Although thermoelectric systems have attractive features in this context, the ability to maintain large temperature differences across device terminals remains increasingly difficult to achieve with accelerated trends in device miniaturization. As a result, a group of scientists in applied sciences and engineering has developed and demonstrated a proposal on an […]


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.

  • Open is not enough
    by Xiaoli Chen on November 15, 2018 at 12:00 am

    Open is not enoughOpen is not enough, Published online: 15 November 2018; doi:10.1038/s41567-018-0342-2The solutions adopted by the high-energy physics community to foster reproducible research are examples of best practices that could be embraced more widely. This first experience suggests that reproducibility requires going beyond openness. […]

  • Design and characterization of electrons in a...
    by S. N. Kempkes on November 12, 2018 at 12:00 am

    Design and characterization of electrons in a fractal geometryDesign and characterization of electrons in a fractal geometry, Published online: 12 November 2018; doi:10.1038/s41567-018-0328-0Electrons are confined to an artificial Sierpiński triangle. Microscopy measurements show that their wavefunctions become self-similar and their quantum properties inherit a non-integer dimension between 1 and 2. […]

  • Signatures of the many-body localized regime in...
    by Thorsten B. Wahl on November 12, 2018 at 12:00 am

    Signatures of the many-body localized regime in two dimensionsSignatures of the many-body localized regime in two dimensions, Published online: 12 November 2018; doi:10.1038/s41567-018-0339-xLarge-scale numerical examination of a disordered Bose–Hubbard model in two dimensions shows entanglement based signature of many-body localization, providing answers to the challenging questions posed by recent experiments. […]

  • Quantum fractals
    by Dario Bercioux on November 12, 2018 at 12:00 am

    Quantum fractalsQuantum fractals, Published online: 12 November 2018; doi:10.1038/s41567-018-0327-1Electrons with fractional dimension have been observed in an artificial Sierpiński triangle, demonstrating their quantum fractal nature. […]

  • Complete reconstruction of bound and unbound...
    by P. A. Carpeggiani on November 12, 2018 at 12:00 am

    Complete reconstruction of bound and unbound electronic wavefunctions in two-photon double ionizationComplete reconstruction of bound and unbound electronic wavefunctions in two-photon double ionization, Published online: 12 November 2018; doi:10.1038/s41567-018-0340-4Photoionization is one of the most important photophysical events. This process can now be characterized in a quantum-mechanically complete manner by use of polarization-controlled extreme-ultraviolet light derived from a […]

  • Made visible by the invisible
    by Véronique Van Elewyck on November 5, 2018 at 12:00 am

    Made visible by the invisibleMade visible by the invisible, Published online: 05 November 2018; doi:10.1038/s41567-018-0332-4Using data from the IceCube telescope, a study presents the first attempt at obtaining geophysical information about Earth’s internal structure from the flux of neutrinos that pass through it. […]

  • Plasmonic dynamics measured with...
    by Nguyen Duy Anh on November 5, 2018 at 12:00 am

    Plasmonic dynamics measured with frequency-comb-referenced phase spectroscopyPlasmonic dynamics measured with frequency-comb-referenced phase spectroscopy, Published online: 05 November 2018; doi:10.1038/s41567-018-0330-6By means of a novel referencing technique that is based on the high stability of frequency combs, broadband phase spectra from plasmonics rulers can now be used to measure dynamic motion of nanostructures with picometre resolution. […]

  • Neutrino tomography of Earth
    by Andrea Donini on November 5, 2018 at 12:00 am

    Neutrino tomography of EarthNeutrino tomography of Earth, Published online: 05 November 2018; doi:10.1038/s41567-018-0319-1Geophysical properties of the Earth’s interior have been inferred by looking at the absorption of neutrinos as they pass through our planet. […]


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

    • Treated superalloys demonstrate unprecedented...
      on November 16, 2018 at 9:45 pm

      Researchers have discovered how to make 'superalloys' even more super, extending useful life by thousands of hours. The discovery could improve materials performance for electrical generators and nuclear reactors. […]

    • A new lead on a 50-year-old radiation damage...
      on November 16, 2018 at 9:45 pm

      For half a century, researchers have seen loops of displaced atoms appearing inside nuclear reactor steel after exposure to radiation, but no one could work out how. […]

    • Kilogram, ampere, kelvin and mole redefined
      on November 16, 2018 at 4:55 pm

      In a landmark decision, representatives from 60 countries voted to redefine the International System of Units (SI), changing the world's definition of the kilogram, the ampere, the kelvin and the mole, forever. […]

    • Affordable catalyst for CO2 recycling
      on November 16, 2018 at 4:06 pm

      A catalyst for carbon dioxide recycling, Mineral pentlandite may also be a conceivable alternative to expensive precious metal catalysts. Pentlandite had previously been known as a catalyst for hydrogen production. By adding a suitable solvent, the researchers successfully utilised it to convert carbon dioxide into carbon monoxide. The latter is a common source material in the chemical industry. […]

    • Controlling organ growth with light
      on November 16, 2018 at 4:05 pm

      In optogenetics, researchers use light to control protein activity. This technique allows them to alter the shape of embryonic tissue and to inhibit the development of abnormalities. Now, scientists have enhanced the technique to stop organ-shaping processes in fruit fly embryos. Their results allow control over a crucial step in embryonic development. […]

    • 3D chemical maps of single bacteria
      on November 16, 2018 at 4:05 pm

      Researchers used ultrabright x-rays to generate 3D nanoscale maps of a single bacteria's chemical composition with unparalleled spatial resolution. […]

    • Metallic nanoparticles light up another path...
      on November 15, 2018 at 8:49 pm

      Scientists have produced subnano-sized metallic particles that are very effective as catalysts for the oxidation of hydrocarbons. These catalysts can be as much as 50 times more effective than well-known Au-Pd bimetallic nanocatalysts. […]

    • 'Smart skin' simplifies spotting strain in...
      on November 15, 2018 at 8:49 pm

      A 'smart skin' employs the unique fluorescent characteristics of carbon nanotubes to quickly assess strain in materials. The method is intended for aircraft, spacecraft and critical infrastructures in which mechanical strain needs to be monitored. […]

    • Arming drug hunters, chemists design new reaction...
      on November 15, 2018 at 7:49 pm

      Organic chemists have forged a powerful new tool for drug hunters -- a simple, elegantly designed chemical reaction that could fling open an underexplored wing of biologically relevant chemistry. […]

    • Solar panels for yeast cell biofactories
      on November 15, 2018 at 7:49 pm

      Scientists presents a highly adaptable solution to creating yeast biohybrids with enhanced metabolism driven by light energy. […]