Articles tagged with Buoyancy
Researchers at Arizona State University have discovered an overlooked physical process that significantly impacts sweat's cooling effect in hot, dry environments. The study found that temperature and humidity can create an opposing upward flow near the skin, canceling out airflow and increasing body heat storage.
Marine plankton's ability to absorb CO2 is influenced by ocean density, with denser waters leading to reduced calcification and increased alkalinity. This discovery reframes our understanding of the complex interplay between marine life and the global climate system.
Research reveals that crude oil pollution dramatically reduces sea otter fur buoyancy, placing newborn pups at risk due to their larger surface area relative to body mass. After cleaning, the buoyancy of the fur improves but not fully recovers, highlighting the need for thorough detergent rinsing.
A European research team conducted experiments in weightlessness to isolate the classic diffusion phenomenon, closing the gap with experimental validation. The study used a sounding rocket to create a state of almost complete weightlessness, allowing researchers to run their experiments automatically.
Researchers at Imperial College London and the University of Bristol studied 60 explosive volcanic eruptions worldwide to understand the frequency, composition, and size of eruptions. They found that magma buoyancy, storage time in shallower chambers, and reservoir size are key factors driving eruptions.
The study of fluid dynamics involved in forming horizontal air cavities and the transition between floating and skipping, reveals complex interactions at the air-water interface. The pulling angle plays a significant role in shaping hydrodynamics, with larger angles resulting in different air-cavity lengths and skipping distances.
African Superplume is responsible for rift-parallel deformation and seismic anisotropy in the East African Rift System, contradicting previous theories on plate-driving forces. The study uses 3D thermomechanical modeling to explain this phenomenon.
A study by researcher Breno Arsioli Moura investigated the depictions of Benjamin Franklin's famous kite experiment in illustrations published in the 19th century. The study found several inaccuracies, including the incorrect location where the experiment was performed and the method used to harness electricity from the clouds.
A University of California, Davis study reveals that air temperature and cloud cover are influenced by the buoyancy effect of water vapor, which is currently neglected in some leading global climate models. This effect can lead to an error of up to 50% in low cloud cover predictions, impacting the planet's energy balance.
Researchers studied the bones of an extinct amphibian species and found that its shoulder girdle was densely compact, similar to modern manatees. This adaptation allowed the creature to sink and hunt underwater, while its smaller legs and rounded skull suggest it may have only surfaced occasionally.
Researchers recreated ancient ammonite movement using robotic models, exploring trade-offs between stability and maneuverability. The study found that different shell shapes offered varying advantages and consequences, with no single perfect design.
Researchers discovered that Chaoborus larvae adjust their air-sacs' volume by changing the pH level, utilizing resilin's elastic properties. This unusual adaptation enables them to float neutrally buoyant in water.
Researchers at WVU are creating control software for aerial robots to survey Venus' atmosphere, helping model the evolution of climate on Earth. The aerobots will use a hybrid airship design and energy-efficient paths to explore the planet's surface.
A new study aims to use the microgravity conditions of space to better understand how flames spread on Earth. By performing complementary ground-based and microgravity experiments, researchers can precisely measure flame spread along a combustible object, allowing for more accurate predictions of wildfire behavior.
Researchers found clear reflected seismic phases between 410-km and 660-km, indicating subducted oceanic plates are trapped at the bottom of the mantle transition zone. This discovery sheds light on mantle dynamics and circulation of deep materials.
Researchers used 3-D printed models to explore fractal-like interior shell patterns in ancient ammonoids. The study suggests that the intricate sutures and septa may have retained more liquid through surface tension, helping the ammonoids fine-tune their buoyancy.
In 2D simulations, researchers found that the pseudo-turbulence relationship changes within larger-scale flows in less viscous fluids. The team discovered an inverse energy cascade and a different mathematical relationship between flow energy and frequency.
A study by UC Davis found that cold air rises in the tropics due to water vapor's lightness, forming clouds and thunderstorms. This buoyancy effect helps regulate tropical climates and reduces climate warming.
Researchers have developed a new model to track object drift based on satellite data from GPS-equipped buoys in the Florida Current. The study finds that buoyancy has the greatest effect on an object's trajectory, with implications for cleaning up ocean litter and tracking algae movement.
Scientists have discovered a primordial soup in the Earth's mantle older than the moon, containing helium-3, a vestige of the Big Bang. Only the hottest and most buoyant mantle plumes draw from this reservoir, suggesting it may be preserved due to its density.
Researchers discovered that backswimmers can extract oxygen from the surrounding water using their air bubbles, extending dives by up to 20%. The insects adjust the buoyancy of their bubble by replacing nitrogen with gases like helium and sulphur hexafluoride.
A new study suggests that massive magma chambers in supervolcanoes may erupt when the roof above them cracks or collapses, rather than building up internal pressure. The researchers found that the size of the magma chamber is a key factor in triggering eruptions, and that external forces such as earthquakes or faults may play a role.
Researchers at CU-Boulder propose that water trapped deep below Earth's crust may have flooded the lower crust, creating buoyancy and lift, which could explain the region's high elevation. This mechanism is supported by past seismic studies showing a correlation between crustal thickness/density and elevation.
Research by Brown University scientists found that paramecia's buoyancy affects their ability to navigate flat surfaces. Under normal conditions, they use their sensory systems to turn and swim away, but with altered buoyancy, they get stuck at an angle, unable to complete the turn.
Researchers discovered that elephant seals dive more efficiently with moderate body fat by changing their buoyancy. As they add fat stores during months-long migrations, the seals become neutrally buoyant, reducing energy costs and increasing time spent feeding at depth.
Researchers observed that worker ants and broods were extremely resistant to submersion during floods. The ants protected the queen by placing her in the center of the raft, with workers using the brood's buoyancy and their own recovery ability to minimize injury or death.
Researchers at ETH Zurich and ESRF have identified a trigger for supereruptions, finding that the overpressure generated by density differences in the magma chamber alone can trigger an eruption. The study suggests that supervolcanos are not triggered solely by overpressure due to magma recharge.
A new study reveals that hypergravity significantly affects the dynamic changes of electric discharges, causing the plasma channel to move due to external forces. The research has potential applications in improved safety precautions for manned space flights and ion thruster design.
Acidification provides the thrust for kimberlites to ascend through the Earth's crust, with assimilated xenoliths playing a crucial role in facilitating the process. This discovery enhances understanding of kimberlite genesis and will aid in searching for new diamond-bearing ores.
Researchers from British Antarctic Survey discovered that copepods use a remarkable transformation of their oily body fluids to adjust buoyancy, similar to whales' 'diver's weight belt'. This adaptation allows copepods to overwinter in deep waters without wasting energy on constant swimming.
Researchers from the Virginia Institute of Marine Science deployed an underwater glider in the Ross Sea near Antarctica, collecting data on water temperature, salinity, and chlorophyll concentrations. The glider's continuous sampling allows for a better understanding of short-term physical changes and their impact on ocean biology.
Physicists at the University of Toronto and Rutgers University have successfully recreated a supernova explosion in a laboratory setting. The experiment, led by Michael Rogers, involved triggering a chemical reaction that generated a miniaturized version of the explosive process seen in stars.
Researchers deployed data loggers on leatherback females to study their diving patterns. The team found that the turtles dive at an average angle of 41deg and swim less hard as they descend. By varying the amount of air they inhale, leatherbacks regulate their buoyancy before diving.
Researchers have discovered a way to levitate heavy objects, such as diamonds and precious metals, using a safe mixture of liquid nitrogen and oxygen. This technology has potential applications in mining and pharmaceutical industries.
Researchers have re-determined the content of argon in air, finding it to be approximately 0.9332%, very close to historical measurements made 100 years ago. This new value is significant for precision mass measurements, which require accurate corrections for air density.
Two robotic gliders, Slocum Glider and Seaglider, will be tested operationally off Southern California this winter. The gliders harness changes in buoyancy or temperature layers to collect data on ocean currents, salinity, and biological sounds.
A new study from Georgia Institute of Technology suggests that buoyancy plays a crucial role in causing hot, partially molten rocks to rise and erupt through the surface at mid-ocean ridges. This finding contradicts the long-held assumption of passive sea-floor spreading.