Vidéos (73)

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  Soliton Wave in a Bose-Einstein Condensate

  Ajoutée il y a 29 mois

  2:14 | 1823 vues

  http://www.FreeScienceLectures.com This video presents dark solitons in a trapped Bose-Einstein condensate decaying into quantum vortex rings. Simulation of condensates with vortices in rotating anisotropic traps, then a 12-vortex array, then...

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  Sodium Reacts with Liquid Water

  Ajoutée il y a 29 mois

  0:27 | 2848 vues

  http://www.FreeScienceLectures.com Sodium is a chemical element which has the symbol Na (Latin: natrium), atomic number 11, atomic mass 22.9898 g/mol, oxidation number +1. Sodium is a soft, silvery white, highly reactive element and is a member of...

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  Sodium Reacts with Four Acids

  Ajoutée il y a 29 mois

  0:39 | 1893 vues

  http://www.FreeScienceLectures.com Here is an experiment where sodium reacts with four different acids - 6M HCl, 12M HCl, 6M HNO3 and 15M HNO3. The reaction with 15M HNO3 is the fastest and 12M HCl is the slowest reaction and it still hasn't...

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  Sodium Burning in Air

  Ajoutée il y a 29 mois

  0:45 | 1595 vues

  http://www.FreeScienceLectures.com Sodium does not react easily with oxygen at a room temperature so it has to be heated up a little for the reaction to start. Since air is mostly oxygen once the reaction starts it gets pretty violent and the...

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  Rotation, Seasons and Surface of Planet Mars

  Ajoutée il y a 29 mois

  3:04 | 2783 vues

  http://www.FreeScienceLectures.com Mars is the fourth planet from the Sun in the Solar System. The planet is named after Mars, the Roman god of war. It is also referred to as the "Red Planet" because of its reddish appearance as seen from...

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  Rocket Carrying GPS 2R Satellite Explodes

  Ajoutée il y a 29 mois

  1:40 | 1525 vues

  http://www.FreeScienceLectures.com Accidents happen. Even at NASA where they have strong testing and integrity procedures. A rocket carrying a GPS 2R just seconds into the mission explodes. More than 250 tons of flaming debri and rocket fuel rain...

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  Richard Feynman: The Beauty of the Flower

  Ajoutée il y a 29 mois

  1:43 | 1140 vues

  http://www.FreeScienceLectures.com This video is from 1981. The interview is also the subject of Feynman's book The Pleasure of Finding Things Out. I have a friend who's an artist and he's some times taken a view which I don't...

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  Resonance Phenomena in 2D on a Plane

  Ajoutée il y a 29 mois

  2:13 | 1291 vues

  http://www.FreeScienceLectures.com The plane is vibrated at some specific frequency. The waves travel across the plane and at some places they add together and at other places they cancel out. Where they cancel out the salt stucks because there is...

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  Rare, Prehistoric Frilled Shark in Japan

  Ajoutée il y a 29 mois

  1:35 | 2210 vues

  http://www.FreeScienceLectures.com Ever seen a shark like this? This species of prehistoric shark called Frilled Shark and it is very rarely seen alive because its natural habitat is some 600 meters or more under the sea. The frilled shark,...

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  Puma, Bird and Exploding Balloon in Slow Motion

  Ajoutée il y a 29 mois

  1:41 | 1948 vues

  http://www.FreeScienceLectures.com This video shows action much slower than you see on television or with your eyes. For example, a puma running ten times slower, you can see every muscle moving. Then some bird flying 10 times slower. But...