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10924 |
duddy |
8 years ago |
World's largest vacuum
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See what happens when scientists drop a bowling ball and a feather in the world's largest vacuum; for the science-illiterate viewers out there (sorry ), a vacuum is a space entirely devoid of matter (also known as an absolute vacuum). A lot of you probably already know how this one ends, but that doesn't make watching it play out any less spectacular. ...
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6656 |
duddy |
9 years ago |
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18157 |
duddy |
8 years ago |
World's first x-ray image of a human body part
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Wilhelm Conrad Röentgen, a physics professor at the University of Wurburg in Germany, was experimenting with electric current flow in a partially evacuated glass tube in 1895 and one night he noticed a glow caused by an unknown radiation. He named the phenomenon x-radiation and few months later he took the first x-ray photograph of a body part: the bones in his wife’s hand – and one can even see her wedding band. The first even x-ray image was of a key.
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1977 |
duddy |
10 years ago |
Will the Big Bang be a thing of the past?
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Cosmologists have formulated a new theory that suggest the universe didn’t start with the Big Bang. They believe the birth of the universe happened after a 4D star collapsed into a black hole and ejected debris, which helps explain why the universe has an almost uniform temperature.
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3104 |
duddy |
11 years ago |
Why does water bridge form in the presense of electricity?
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If you fill two beakers with water, apply an electric voltage across them, and then separate them, you will form a water bridge. This phenomena was discover some 120 years ago and researchers believe it occurs because the voltage makes the water molecules line up, generating a dielectric tension that defies gravity, stopping the bridge from falling. Understanding how water bridges form could help engineers develop better electrowetting displays. ...
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2747 |
duddy |
11 years ago |
Why does airplane food taste strange?
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If you've been fortunate enough to fly on an airplane, you've probably noticed that the food tastes a bit strange. It turns out that it's not actually because of the food itself (even if you are sitting in economy) but the reduced atmospheric pressure on board and the dry nose and mouth we get from flying, says an expert.
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2801 |
duddy |
11 years ago |
When chemistry and physics come together
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When chemistry and physics come together, it looks awesome. This is the emission spectra of the Elements - in other words, these are the colors they emit in the gaseous state.
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4105 |
duddy |
9 years ago |
What if the moon was closer... a lot closer?
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What would happen if the Moon orbited at the same distance as the International Space Station? An animator has created a mind-blowing video of what it would look like:
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2742 |
duddy |
10 years ago |
What happens when all the oil (petroleum) is used up?
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Peter Diamandis makes a case for optimism -- that we'll invent, innovate and create ways to solve the challenges that loom over us. "I'm not saying we don't have our set of problems; we surely do. But ultimately, we knock them down."
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5688 |
duddy |
10 years ago |
What does Chernobyl look like after so many years being abandonment?
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The Chernobyl disaster of 1986 was one of the worst man-made disasters of the 20th century. An explosion and fire released large quantities of radioactive particles into the atmosphere, which spread over much of the western USSR and Europe. During the accident itself, 31 people died, and long-term effects such as cancers and deformities are still being accounted for. An abandoned ferris wheel and buildings reclaimed by nature - the remains of the 1986 Chernobyl disaster show what a city looks like when everyone disappears.
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1413 |
duddy |
9 years ago |
What do sounds look like?
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In this video, sand is sprinkled onto a metal plate attached to a speaker, which is then turned up the to bring the whole thing to life in a pulsating, dance of intricate patterns.
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15511 |
duddy |
9 years ago |
What a flame looks like in microgravity
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Flames look a little different in space. On Earth, gravity causes a candle flame to be teardrop-shaped, and carries soot to the flame's tip, making it yellow. In microgravity, where these forces are absent, the flame is spherical, soot-free, and blue.
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3583 |
duddy |
9 years ago |
We are the stars, we are the universe
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I'd like to share this mind-opening video. Astrophysicist Dr. Neil DeGrasse Tyson was asked by a reader of TIME magazine, "What is the most astounding fact you can share with us about the Universe?" This is his answer. By far, one of the best...
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4532 |
ehd123 |
9 years ago |
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8568 |
duddy |
9 years ago |