De l'eau invisible
Ce phénomène est obtenu en remplissant un bac d'hydrogène pur. Puisque l'hydrogène est moins dense que l'air qui l'entoure, les objets flottent.
Ce phénomène est obtenu en remplissant un bac d'hydrogène pur. Puisque l'hydrogène est moins dense que l'air qui l'entoure, les objets flottent. ( moins )
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![J'ai trouvé ce fabuleux clip sur Youtube dont voici les infos:
mp3: http://symphonyofscience.com
The Poetry of Reality is the fifth installment in the Symphony of Science music video series. It features 12 scientists and science enthusiasts, including Michael Shermer, Jacob Bronowski, Carl Sagan, Neil deGrasse Tyson, Richard Dawkins, Jill Tarter, Lawrence Krauss, Richard Feynman, Brian Greene, Stephen Hawking, Carolyn Porco, and PZ Myers, promoting science through words of wisdom.
Special thanks are due to The Sagan Appreciation Society:
http://www.youtube.com/user/SaganAppr...
and Connie Barlow:
http://www.youtube.com/user/ghostsofe...
for their huge help in finding source materials. Check out their Youtube pages! Thanks also to all of you who suggested footage that I have not mentioned, I really appreciate it.
Check out http://symphonyofscience.com for more science music videos!
And my other website for more original electronic music: http://www.colorpulsemusic.com
Now available in HD for your viewing pleasure. Enjoy!
John
john@symphonyofscience.com
Lyrics:
[Michael Shermer]
Science is the best tool ever devised
For understanding how the world works
[Jacob Bronowski]
Science is a very human form of knowledge
We are always at the brink of the known
[Carl Sagan]
Science is a collaborative enterprise
Spanning the generations
We remember those who prepared the way
Seeing for them also
[Neil deGrasse Tyson]
If you're scientifically literate,
The world looks very different to you
And that understanding empowers you
Refrain:
[Richard Dawkins]
There's real poetry in the real world
Science is the poetry of reality
[Sagan]
We can do science
And with it, we can improve our lives
[Jill Tarter]
The story of humans is the story of ideas
That shine light into dark corners
[Lawrence Krauss]
Scientists love mysteries
They love not knowing
[Richard Feynman]
I don't feel frightened by not knowing things
I think it's much more interesting
[Brian Greene]
There's a larger universal reality
of which we are all apart
[Stephen Hawking]
The further we probe into the universe
The more remarkable are the discoveries we make
[Carolyn Porco]
The quest for the truth, in and of itself,
Is a story that's filled with insights
(Refrain)
[Greene]
From our lonely point in the cosmos
We have through the power of thought
Been able to peer back to a brief moment
After the beginning of the universe
[PZ Myers]
I think that science changes the way your mind works
To think a little more deeply about things
[Dawkins]
Science replaces private predjudice
With publicly verifiable evidence](http://s1.ttimg.com/img/related/thumbs112x63/52525_default.jpg?20100228015524)
http://fr.wikipedia.org/wiki/Hexafluorure_de_soufre
La poussée d'archimède exercée par ce fluide est suffisante pour s'opposer au poids de la barquette en aluminium.
Par analogie on flotte mieux sur l'eau salée plus dense que l'eau douce.
Spam