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Shizz for Psi Fi.
If you have any math/science puns send them in or use the hashtag #PsiFiGeeks … Please? :p
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What’s really happening when you have a drink of water.
c-estclaire
I watched this for way too long
wwwut
ohdeerl0rd
*sluuurp gulp nom nom*
Italians put ‘disco ball’ into orbit
Italian physicists have put a test particle into space to attempt to measure an effect predicted by general relativity.
The object, which is about the size of a football, made of tungsten and covered with 92 reflectors, is supposedly the “most perfect” test particle ever put into space. It’s entirely passive, weighs 400kg, and will be tracked by lasers from Earth.
It was launched on 13 February, 2012, and is known as Lares, or the “Laser Relativity Satellite”. Its objective is to provide data that will allow physicists to measure a phenomenon known as rotational frame-dragging.
This is a tiny, subtle effect predicted by general relativity where massive spinning bodies, like planets, drag space-time with them as they turn, changing the angle at which small particles close by rotate.
Nasa’s Gravity Probe B, launched in 2004, contained four small, spherical gyroscopes to try and measure this effect, but problems with the spacecraft reduced their accuracy to only about 20 percent. The Italians believe their approach is a much cheaper way of achieving the same goal.
It’s hoped that by tracing the angle of Lares’ rotation, along with a pair of other less-perfect balls already in orbit - Lageos 1 & 2 - the frame-dragging effect will finally be able to be observed.
Social Sciences:
Social science refers to the academic disciplines concerned with society and human behavior.[1] “Social science” is commonly used as an umbrella term to refer to anthropology, archaeology, criminology, economics, education, history, linguistics, communication studies, political science, international relations, sociology, human geography, and psychology, and includes elements of other fields as well, such as law, cultural studies, environmental studies, and social work.
The term may however be used in the specific context of referring to the original science of society established in 19th century sociology (Latin: socius, “companion”; -ology, “the study of”, and Greekλόγος, lógos, “word”, “knowledge”). Émile Durkheim, Karl Marx and Max Weber are typically cited as the principal architects of modern social science by this definition.[2]Positivist social scientists use methods resembling those of the natural sciences as tools for understanding society, and so define science in its stricter modern sense. Interpretivist social scientists, by contrast, may use social critique or symbolic interpretation rather than constructing empirically falsifiable theories, and thus treat science in its broader sense. In modern academic practice, researchers are often eclectic, using multiple methodologies (for instance, by combining the quantitative and qualitative techniques). The term social research has also acquired a degree of autonomy as practitioners from various disciplines share in its aims and methods.
I looked social sciences after reading in my sociology book that, amongst other subjects, economics is a social science!! Honestly, all the awesome subjects are from social sciences, and hence, being so awesome, they are neglected and undervalued, if not shunned, by the majority of the world’s societies.
What is Quantum Physics?
Quantum physics is a branch of science that deals with discrete, indivisible units of energy called quanta as described by the Quantum Theory. There are five main ideas represented in Quantum Theory:
- Energy is not continuous, but comes in small but discrete units.
- The elementary particles behave both like particles and like waves.
- The movement of these particles is inherently random.
- It is physically impossible to know both the position and the momentum of a particle at the same time. The more precisely one is known, the less precise the measurement of the other is
- The atomic world is nothing like the world we live in.
While at a glance this may seem like just another strange theory, it contains many clues as to the fundamental nature of the universe and is more important than even relativity in the grand scheme of things (if any one thing at that level could be said to be more important than anything else). Furthermore, it describes the nature of the universe as being much different then the world we see. As Niels Bohr said, “Anyone who is not shocked by quantum theory has not understood it.”
Rare Fire Rainbows: It looks like a rainbow on fire but these circumhorizontal arcs aren’t rainbows. They are caused by light passing through high-altitude cirrus clouds. The sun has to hit the clouds at precisely 58 degrees and have just enough crystals in order to form in the sky.
ameftohaunter
That’s awesome looking!!
Above: What sand really looks like—grains of sand photographed at the microscopic level by TEDxMaui speaker Dr. Gary Greenberg, a process discussed in his talk, “Big beauty in tiny things”:
“Sand is about a tenth of a millimeter in size—each sand grain is about a tenth of a millimeter in size. But when you look closer…it’s really quite amazing.
[In sand from Maui], you have microshells there; you have things like coral; you have fragments of other shells; you have olivine; you have bits of volcano…you have tube worms—an amazing array of incredible things exist in sand.…In a place like [Maui], a lot of the sand is made up of biological material because the reefs provide a place where all these microscopic animals or macroscopic animals grow, and when they die, their shells and their teeth and their bones break up and they make up grains of sand…
When we’re walking along a beach, we’re actually walking along millions of years of biological and geological history. We don’t realize it, but it’s actually a record of that entire ecology…If you look at different sands from different places: every single beach, every single place where you look at sand—it’s different.”
Photos via sandgrains.com. See more of Gary’s photography documenting the “microworld” here.
Unlike most racket sports, badminton uses a projectile that is nothing like a sphere. The unusual shape of the shuttlecock not only creates substantial drag in comparison to a ball but increases the complexity of its flight path. The heavy head of the shuttlecock creates a moment that stabilizes its flight, ensuring that the head always points in the direction of travel. The skirt, traditionally made of feathers though many today are plastic, is responsible for the aerodynamic forces that make the shuttlecock’s behavior so interesting.
Measuring the drag coefficient of the shuttlecock, modeling its trajectory and behavior in the four common badminton shots, and even attempting computational fluid dynamics of the shuttlecock are all on-going research problems in sports engineering. (Photo credit: Rob Bulmahn)
FYFD is celebrating the Olympics with the fluid dynamics of sports. Check out our previous posts on how the Olympic torch works, what makes a pool fast, and the aerodynamics of archery.
Why you should care about the speed of light
A change in how scientists conceptualize relativity could alter how we think about causality and turn physics on its head.
If there was life on Mars, scientists may have found its final resting spot.
A warming climate is likely to wipe out spring-run Chinook salmon in at least one California watershed by the century’s end, found a new study.
The Haunting Beauty of NGC 3190 —A Deadly Supernova Factory
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This magnificent galaxy inspires us, again, to ask: does advanced life exist there? The fact that we have no proof of intelligent life elsewhere in the universe may simply mean that intelligent civilizations have all too finite lifetimes. NGC 3190 is a spiral galaxy of unbearable beauty in the constellation Leo. It was discovered by William Herschel in 1784. In 2002, astronomers uncovered one supernova in March in the southeastern part and then another team uncovered a second supernova on the other side two months later -sure destroyers of vicinity-based life.
The spectacular image below is the “Trio in Leo.” There is actually a fourth member of this group which not shown- but the group also goes by another catalogued name of “Hickson 44.” These galaxies are estimated to be 60 million light years away. The galaxy furthest to the left is an elliptical galaxy (NGC 3193) and is fairly devoid of detail. The top center of the image features NGC 3190.
(via dailygalaxy)
Stunning photo shows colliding galaxies forming exclamation point in space
Collision provides a model for how the Milky Way and Andromeda galaxies will merge billions of years from now.