Last update This dance is taken: Hundreds of male frog species change colors around mating time, 1 hour ago
University of Chicago physicists working in the nascent field of experimental vortex dynamics have, with unexpected help from a Sharpie marker, achieved the first measurements of an elusive but fundamental property of fluid ...
Brandon Jackson, a doctoral candidate in mechanical engineering at Michigan Technological University, has created a new computational model of an electrospray thruster using ionic liquid ferrofluid—a promising technology ...
For surfers, finding the "sweet spot," the most powerful part of the wave, is part of the thrill and the challenge.
Imagine walking from one side of a swimming pool to the other. Each step takes great effort—that's what makes water aerobics such effective physical exercise.
Ocean circulation patterns have a profound effect on global climate. Waves deep within the ocean play an important role in establishing this circulation, arising when tidal currents oscillate over an uneven ocean bottom. ...
When you think of turbulence, you might think of a bumpy plane ride. Turbulence, however, is far more ubiquitous to our lives than just air travel. Ocean waves, smoke from fire, even noise coming from jet engines or wind ...
Most of the world's oil and natural gas reserves may be locked up inside the tiny pores comprising shale rock. But current drilling and fracturing methods can't extract this fuel very well, recovering only an estimated 5 ...
Researchers in South Korea have quantitatively deconstructed what they describe as the "ingenious mobility strategies" of seeds that self-burrow rotationally into soil. This is an example of the many ways nature uses biological ...
An important concept in future healthcare is the development of devices called "lab on a chip." These "chips," not related to the electronic ones found in computers, are small devices in which biological fluids – blood ...
There are many processes, such as propulsion, in which fluid in a supercritical state, where the temperature and pressure put a substance beyond a distinguishable liquid or gas phase, is injected in an environment of supercritical ...
A group of researchers at Zhejiang University's State Key Laboratory of Fluid Power and Mechatronic Systems, in Hangzhou, China, recently discovered that a new bubbling mechanism may exist within the realm of physics.
Those who have mixed oil and vinegar may have unknowingly observed a strange fluid phenomenon called fingering instability. A type of this phenomenon, called viscous fingering (VF), occurs in porous media where fluids of ...
Taking a simpler approach to a complex problem, Yale researchers have an answer for why large grains move more easily than smaller ones when driven by fluid flow along a riverbed—a question that has confounded scientists ...
Imagine a liquid that could move on its own. No need for human effort or the pull of gravity. You could put it in a container flat on a table, not touch it in any way, and it would still flow.
Researchers at North Carolina State University have developed a technique that uses light to get two-dimensional (2-D) plastic sheets to curve into three-dimensional (3-D) structures, such as spheres, tubes or bowls.
Plunging hot spheres into viscous liquids reveals a way to reduce fluid resistance without complex engineering procedures.
It is easy to speculate why fish might swim in schools—better protection from predators, improved foraging capability, easier fish-to-fish communication. Yet, none of these reveal why fish might move together in a specific ...
Ever wonder why you have to shake your bottle of ketchup or mustard before pouring? Or why, to get out of quicksand, you must move slowly? Or why you can run on the surface of a suspension of cornstarch in water, but you'd ...
A key factor to improve swimming performance is reducing resistance that water exerts on the moving body. This resistance, known as drag, is influenced by factors including the stroke rate, swimmer's size, and swimming speed. ...
Vesicles, like living cells, are membrane-enclosed "sacs" of fluid that can cushion molecular cargo such as pharmaceutical drugs. If a drug is successfully encapsulated into a vesicle carrier and the carrier remains intact, ...
Cardiovascular diseases are the leading cause of deaths worldwide—yet researchers still don't fully understand how blood flows or even which components within blood can lead to cardiac issues.
Igor Kolokolov and Vladimir Lebedev, scientific experts from HSE's Faculty of Physics and the Landau Institute for Theoretical Physics of Russian Academy of Sciences, have developed an analytical theory binding the structure ...
For years, B. Ubbo Felderhof, a professor at the Institute for Theoretical Physics at Germany's RWTH Aachen University, has explored the mechanisms that fish and microorganisms rely on to propel themselves. Flying birds and ...
Minimizing air resistance and friction with snow is key to elite performance in downhill skiing. Experiments in wind tunnels have revealed the total drag experienced by skiers, but have not provided precise data on which ...
Resembling the Leidenfrost effect seen in rapidly boiling water droplets, a disk of ice becomes highly mobile due to a levitating layer of water between it and the smooth surface on which it rests and melts. The otherwise ...
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Fluids such as water are Newtonian, and their viscous behavior is well understood. However, many common fluids are "viscoelastic." These fluids, such as those commonly found in cosmetics, soaps and paints, possess a combination ...
New research shows that it is not only the size, but the shape of a tube that determines whether a liquid will spill out of it when tipped over.
Water has an unusual property when it flows closely to some specially designed surfaces—its speed isn't equal to zero, even in the layer that directly touches the wall. This means that liquid doesn't adhere to the surface, ...
By carefully observing scenes as simple as leaves falling from trees or dandelion seeds blowing in the wind, we can see diverse "falling styles" that include tumbling, fluttering or spiraling.
Researchers at the University of Connecticut have uncovered new information about how particles behave in our bloodstream, an important advancement that could help pharmaceutical scientists develop more effective cancer drugs.
Beneath the surface of rivers and streams, aquatic plants sway with the current, playing an unseen but vital role in the life of the waterway. Through a new series of experiments that model these underwater undulations, researchers ...
Clinking your glass of beer often leaves its contents sloshing back and forth. Soon, though, the motion stops, your drink settles down, and you can take a sip without getting foam on your nose. It turns out that the foam ...
The spinning rainbow surface of a soap bubble is more than mesmerizing – it's a lesson in fluid mechanics. Better understanding of these hypnotic flows could bring improvements in many areas, from longer lasting beer foam ...
Understanding how smoke rings form and dissipate could lead to technology allowing airplanes to soar more efficiently and blood to flow more freely through the human heart.
During the 1990s, Charles S. Campbell, now a professor in the Department of Aerospace and Mechanical Engineering at the University of Southern California, began exploring why large landslides flow great distances with apparently ...
When plaque, fatty deposits that build up on the inside of arteries, rupture and block blood flow, the results can be deadly. Such hardening of the arteries, also called atherosclerosis, typically leads to heart disease, ...
Sunscreen, laundry detergent, the can of paint you just picked up from the hardware store. What if we told you that your everyday liquid consumer products aren't just liquids—they're a complex blend of liquid and solid ...
The spreading of mixable liquids into 'droplet hats' was observed for the first time, which could lead to insight into improving strategies for cleaning animals affected by oil spills.
Moving through water can be a drag, but the use of supercavitation bubbles can reduce that drag and increase the speed of underwater vehicles. Sometimes these bubbles produce a bumpy ride, but now a team of engineers from ...
Look out over the ocean and you might get the impression that it's a mass of water acting as a single entity. However, the world's oceans are made up of layers of different densities, called stratifications, with complex ...
Researchers have uncovered key features of the dynamics of a form of jerky motion responsible for phenomena as diverse as squeaks and squeals in door hinges and automotive brakes, joint wear in the human body and the sudden ...
In 1940, the Tacoma Narrows Bridge collapsed in dramatic fashion, twisting in the wind before it snapped and plunged into the water below. As wind blew across the span, the flow induced oscillating sideways forces that helped ...
If you've ever eaten food while upside down - and who hasn't indulged this chimpanzee daydream? - you can thank the successive wave-like motions of peristalsis for keeping the chewed bolus down and ferrying it into your stomach. ...
Some of nature's most vibrant colors occur in frogs, who peek out from rainforests and marshes in startling shades of blue, yellow and red. But for hundreds of species, only males flaunt flashy colors—and sometimes only ...
New insights into how animals spin silk could lead to new, greener ways of producing synthetic fibres, according to academics at the University of Sheffield.
(Phys.org)—Currently one of the most efficient ways to store solar energy is to transfer the energy to catalysts that split water into hydrogen and oxygen. Then the hydrogen can either be used as a fuel or later recombined ...
Complex life, as we know it, started completely by chance, with small strands of molecules linking up, which eventually would have given them the ability to replicate themselves.
The scorching hot surface of Mercury seems like an unlikely place to find ice, but research over the past three decades has suggested that water is frozen on the first rock from the sun, hidden away on crater floors that ...
Arctic sea ice appeared to have reached its yearly lowest extent on Sept. 13, NASA and the NASA-supported National Snow and Ice Data Center (NSIDC) at the University of Colorado Boulder have reported. Analysis of satellite ...
Ben-Gurion University of the Negev (BGU) researchers have demonstrated that security cameras infected with malware can receive covert signals and leak sensitive information from the very same surveillance devices used to ...
(Phys.org)—A team of astronomers led by Jacob M. Robertson of the Austin Peay State University in Clarksville, Tennessee has detected a new quasi-stellar object (QSO). They found the new quasar, designated SDSS J022155.26-064916.6, ...
Despite the popular narrative that the web is to blame for rising political polarization, a study by a Brown University economist has found that recent growth in polarization is greatest for demographic groups in which individuals ...
Whispering gallery mode (WGM) resonators are used to make tiny micro-lasers, sensors, switches, routers and other devices. These tiny structures rely on a phenomenon similar to an effect observed in circular galleries, such ...
New Virginia Tech research suggests there's wide variation in the risk that unmanned aircraft pose to people on the ground.
Americans appear profoundly unaware of the vast economic inequality that persists between black and white Americans in contemporary society, according to a new study by researchers at Yale University.
A new analysis done to support the investigation into the 2015 sinking of the El Faro cargo ship has calculated the likelihood of a massive rogue wave during Hurricane Joaquin in October of that year - and demonstrated a ...
Sand-swimming lizards, slithering robotic snakes, dusk-flying moths and running roaches all have one thing in common: They're increasingly being studied by physicists interested in understanding the shared strategies these ...
The beautiful sound of birdsongs emerging from the trees is a wonderful example of how much nature can still teach us, even as much about their origins are still mysterious to us. About 40 percent of bird species learn to ...
During almost four years of observing the cosmos, the Herschel Space Observatory traced out the presence of water. With its unprecedented sensitivity and spectral resolution at key wavelengths, Herschel revealed this crucial ...
Devices that allow to route microwave signals are essential engineering tools. In particular, isolators, which let signals flow in one direction but block them in the other, are needed to protect sensitive equipment from ...
Footballers in flashy cars, City workers in Armani suits, reality TV celebrities sipping expensive champagne while sitting in hot tubs: what drives people to purchase luxury goods? New research suggests that it may be a sense ...
Researchers in the United States and Germany have just discovered a previously overlooked part of protein molecules that could be key to how proteins interact with each other inside living cells to carry out specialized functions.
Fluorescence microscopy gives researchers incredible power to illuminate the tiniest structures and capture the real-time activities of live cells by tagging biological molecules with a veritable rainbow of fluorescent dyes. ...
An inexpensive biomaterial that can be used to sustainably replace plastic barrier coatings in packaging and many other applications has been developed by Penn State researchers, who predict its adoption would greatly reduce ...
The mining of resources contained in asteroids, for use as propellant, building materials or in life-support systems, has the potential to revolutionise exploration of our Solar System. To make this concept a reality, we ...
Canadian and US researchers have taken an important step towards enabling quantum networks to be cost-effective and truly secure from attack.
At more than 10 billion miles away from Earth, there is no day and night. Time and space are fathomless and our Sun is a distant point of starlight—a faint reminder of the home NASA's twin Voyagers, humanity's farthest ...
Researchers at Columbia Engineering have solved a long-standing issue in the creation of untethered soft robots whose actions and movements can help mimic natural biological systems. A group in the Creative Machines lab led ...
Not long ago, scientists placed wagers on the number of genes in the human genome. Some bets ranged upward of 100,000 genes being present. Once the human genome sequence was completed, a project led in part by the McDonnell ...
(Phys.org)—A team of researchers with Ernst Moritz Arndt University in Germany and Aarhus University in Denmark has found that female virgin velvet spiders (Stegodyphus dumicola) in addition to assisting close relatives ...
Researchers have designed a system that rapidly recognises the specific biological molecules that can indicate disease.
Radio astronomy is undergoing a major boost, with new technology gathering data on objects in our universe faster than astronomers can analyse.
(Phys.org)—A team of researchers from several institutions in the U.S. has found that algae growing on packed snow causes the snow to melt faster. In their paper published in the journal Nature Geoscience, the team describes ...
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