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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

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Realm : kingdom, sphere, domain — Webster

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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.

  • Astronomers discover giant relic of disrupted...
    on November 19, 2018 at 5:00 am

    (American Friends of Tel Aviv University) A team of astronomers led by TAU's Dr. Noah Brosch has identified a disrupted galaxy resembling a giant tadpole, complete with an elliptical head and a long, straight tail, about 300 million light years away from Earth. The discovery illuminates how and why galaxies disappear. […]

  • Chemistry freed from space and time
    on November 19, 2018 at 5:00 am

    (Wiley) Shopping on the internet, storing photos in the cloud, turning up a thermostat with an app--all are commonplace. Now, the internet of things and the cloud are entering the world of chemical research and production, as reported in the journal Angewandte Chemie. Researchers have used remote servers in Japan to autonomously optimize conditions to synthesize drugs in a British laboratory. The process was controlled over the internet by researchers in the USA. […]

  • Astronomers discover giant relic of disrupted...
    on November 19, 2018 at 5:00 am

    (Royal Astronomical Society) A team of astronomers from Israel, the US and Russia have identified a disrupted galaxy resembling a giant tadpole, complete with an elliptical head and a long, straight tail, about 300 million light years away from Earth. The galaxy is one million light-years long from end to end, ten times larger than the Milky Way. The research is published today in the journal Monthly Notices of the Royal Astronomical Society. […]

  • Freeze-frame microscopy captures molecule's...
    on November 19, 2018 at 5:00 am

    (University of California - Berkeley) One of the body's largest macromolecules is the machinery that gloms onto DNA and transcribes it into mRNA, the blueprint for proteins. But the molecule, TFIID, is complex with lots of floppy appendages, which makes it hard to obtain a clear picture of its structure. Using state-of-the-art cryo-electron microscopy detectors and computer analysis, UC Berkeley scientists have captured unprecedented detail of how TFIID's structure changes as it binds to DNA […]

  • Concomitant use of sleeping pills and strong...
    on November 19, 2018 at 5:00 am

    (University of Eastern Finland) One in five people with Alzheimer's disease (AD) who use a benzodiazepine are also concomitant users of an opioid, according to a new study from the University of Eastern Finland. Concomitant use was more common in comparison persons, but those with AD used strong opioids more frequently. About half of all concomitant users were prolonged users whose use of these drugs had continued for more than three consecutive months. […]

  • UB spinoff Cytocybernetics looks to move into new...
    on November 19, 2018 at 5:00 am

    (University at Buffalo) Cytocybernetics, a University at Buffalo spinoff, has received a $250,000 Small Business Innovation Research award from the National Institute of Mental Health (NIMH) to move into a new market: neuronal drug development. The startup, founded by UB medical researchers, developed and sells the Cybercyte, a futuristic device that integrates electronics with individual cells to test how new medicines affect the cell's electrical activity. […]

  • Artificially intelligent food solutions reduce...
    on November 19, 2018 at 5:00 am

    (Faculty of Science - University of Copenhagen) His research prevents the waste of resources in the global food industry and now he has been awarded the coveted Nils Foss Talent Prize. Associate Professor Klavs Martin Sorensen from the University of Copenhagen researches rapid methods and process analytical technology and immediately puts the results to work in food production, where they prevent huge amounts of waste. […]

  • Insilico Medicine to present predictors of...
    on November 19, 2018 at 5:00 am

    (InSilico Medicine, Inc.) Insilico Medicine presents predictors of drug-induced cardiotoxicity at BioData EU 2018. […]

  • Duke forms prototype of robot dog nose
    on November 19, 2018 at 5:00 am

    (Duke University) Every day, thousands of trained K9 dogs sniff out narcotics, explosives and missing people. These dogs are invaluable for security, but they're also expensive. Duke researchers have made the beginning steps toward an artificial 'robot nose' device that officers could use instead of dogs. The heart of the system would be living odor receptors grown from mouse genes that respond to target odors, including the smells of cocaine and explosives. […]

  • A major step toward non-viral ocular gene therapy...
    on November 19, 2018 at 5:00 am

    (Polytechnique Montréal) Gold nanoparticles, which act like 'nanolenses,' concentrate the energy produced by the extremely short pulse of a femtosecond laser to create a nanoscale incision on the surface of the eye's retina cells. This technology, which preserves cell integrity, can be used to effectively inject drugs or genes into specific areas of the eye, offering new hope to people with glaucoma, retinitis or macular degeneration. […]


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

  • 'Magnetic topological insulator' makes its own...
    on November 19, 2018 at 9:09 pm

    A team of U.S. and Korean physicists has found the first evidence of a two-dimensional material that can become a magnetic topological insulator even when it is not placed in a magnetic field. […]

  • Law of soot light absorption: Current climate...
    on November 19, 2018 at 5:33 pm

    Soot belches out of diesel engines, rises from wood- and dung-burning cookstoves and shoots out of oil refinery stacks. According to recent research, air pollution, including soot, is linked to heart disease, some cancers and, in the United States, as many as 150,000 cases of diabetes every year. […]

  • Making X-ray microscopy 10 times faster
    on November 19, 2018 at 3:00 pm

    Microscopes make the invisible visible. And compared to conventional light microscopes, transmission x-ray microscopes (TXM) can see into samples with much higher resolution, revealing extraordinary details. Researchers across a wide range of scientific fields use TXM to see the structural and chemical makeup of their samples—everything from biological cells to energy storage materials. […]

  • Efficient and stable emission of warm white light...
    on November 19, 2018 at 2:40 pm

    One-fifth of global electricity consumption is based on lighting; efficient and stable white-light emission with single materials is ideal for applications. Photon emission that covers the entire visible spectrum is, however, difficult to attain with a single material. Metal halide perovskites, for instance, have outstanding emission properties but contain lead, and therefore yield unsatisfactory stability. A new report published by Jiajun Luo and co-workers details a lead-free double […]

  • What smart hazmat suits and Sonora cactus skins...
    on November 19, 2018 at 2:30 pm

    When Konrad Rykaczewski moved to Arizona's Sonora Desert region six years ago he took a water bottle and sprayed the plants in his front yard, not to water them, but to see how they interacted with water droplets. […]

  • Universal laws in impact dynamics of dust...
    on November 19, 2018 at 2:13 pm

    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 to understand how granular clumps stick together, and how planets are formed. […]

  • Swarmlike collective behavior in bicycling
    on November 19, 2018 at 7:38 am

    Whether it's the acrobatics of a flock of starlings or the synchronized swimming of a school of fish, nature is full of examples of large-scale collective behavior. Humans also exhibit this behavior, most notably in pelotons, the mass of riders in bicycle races. […]

  • Researchers propose solutions for urine sample...
    on November 19, 2018 at 7:37 am

    Urinating into a cup may be a medical necessity for monitoring the health of the kidney and other issues, but it's often uncomfortable, embarrassing and messy—especially for women. But what if there were a way to comfortably provide a sample without the splashback? […]

  • Scientists explain how wombats drop cubed poop
    on November 18, 2018 at 11:23 pm

    Wombats, the chubby and beloved, short-legged marsupials native to Australia, are central to a biological mystery in the animal kingdom: How do they produce cube-shaped poop? Patricia Yang, a postdoctoral fellow in mechanical engineering at the Georgia Institute of Technology, set out to investigate. […]

  • Helping Marvel superheroes to breathe
    on November 18, 2018 at 11:22 pm

    Marvel comics superheroes Ant-Man and the Wasp—nom de guerre stars of the eponymous 2018 film—possess the ability to temporarily shrink down to the size of insects, while retaining the mass and strength of their normal human bodies. But a new study suggests that, when bug-sized, Ant-Man and the Wasp would face serious challenges, including oxygen deprivation. […]


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.

  • Physics at the zoo
    by Zoe Budrikis on November 19, 2018 at 12:00 am

    Physics at the zooPhysics at the zoo, Published online: 19 November 2018; doi:10.1038/s41567-018-0364-9Physics at the zoo […]

  • Universal <i>T</i>-linear resistivity...
    by A. Legros on November 19, 2018 at 12:00 am

    Universal T-linear resistivity and Planckian dissipation in overdoped cupratesUniversal <i>T</i>-linear resistivity and Planckian dissipation in overdoped cuprates, Published online: 19 November 2018; doi:10.1038/s41567-018-0334-2A transport study of overdoped cuprates reveals a resistivity that is linear as the temperature approaches 0 K, and is associated with a universal scattering rate. […]

  • High-harmonic generation from solids
    by Shambhu Ghimire on November 19, 2018 at 12:00 am

    High-harmonic generation from solidsHigh-harmonic generation from solids, Published online: 19 November 2018; doi:10.1038/s41567-018-0315-5This Review surveys recent efforts at understanding and characterizing generation of high harmonics from solid-state materials. […]

  • Plasmonic quantum size effects in silver...
    by Alfredo Campos on November 19, 2018 at 12:00 am

    Plasmonic quantum size effects in silver nanoparticles are dominated by interfaces and local environmentsPlasmonic quantum size effects in silver nanoparticles are dominated by interfaces and local environments, Published online: 19 November 2018; doi:10.1038/s41567-018-0345-zThe origin of size-dependent shifts of surface plasmon resonances in metal nanoparticles has been controversial for decades. A combined experimental and theoretical study on silver samples and their environments now […]

  • 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. […]

  • 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 […]


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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.

    • Freeze-frame microscopy captures molecule's...
      on November 19, 2018 at 9:02 pm

      One of the body's largest macromolecules is the machinery that gloms onto DNA and transcribes it into mRNA, the blueprint for proteins. But the molecule, TFIID, is complex with lots of floppy appendages, which makes it hard to obtain a clear picture of its structure. Using state-of-the-art cryo-electron microscopy detectors and computer analysis, scientists have captured unprecedented detail of how TFIID's structure changes as it binds to DNA and recruits other proteins. […]

    • Bending light around tight corners without...
      on November 19, 2018 at 9:02 pm

      Researchers demonstrate a new optical waveguide capable of bending photons around tight corners on a smaller scale than previously possible. The technology is made possible by through photonic crystals using the concept of topological insulators. […]

    • Human images from world's first total-body...
      on November 19, 2018 at 9:02 pm

      EXPLORER, the world's first medical imaging scanner that can capture a 3D picture of the whole human body at once, has produced its first scans. […]

    • New non-mechanical laser steering technology
      on November 19, 2018 at 9:00 pm

      Steerable electro-evanescent optical refractor (SEEOR) chips take laser light in the mid-wavelength infrared (MWIR) as an input and steers the beam at the output in two dimensions without the need for mechanical devices. […]

    • 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. […]