Category: Sciences
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Let the US government teach you a language
These are language courses which have been developed by the US government and are set in the public domain. So, you can use them as much as you want. A long list of languages: Amharic Arabic Bulgarian Cambodian Cantonese Chinese Chinyanja Czech Finnish French Fula German Greek Hausa Hebrew Hindi Hungarian Igbo Italian Japanese Kituba…
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Test for Earthquakes
Building a tall structure able to resist the worst earthquakes, asks for some flexibility in the architecture. For this, it may be useful to do some tests simulating the furious conditions of a real earthquake. YouTube link
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Inside a 4-stroke piston engine
You certainly know the basic principles of the operation of a 4-stroke engine with its different phases: piston going down to suck gas and air in piston going up to compress the mixture piston going down pushed by the explosion piston going up to push burnt gas out of the cylinder Let’s admire the actual…
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Genetics 101
If you were not sure that genetics was a science, you needed a controlled experiment. Here is the result of such an experiment:
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High temperatures, low temperatures
Here, we don’t even speak about Summer or Winter; This is not about global warming either. The Rasmussen College presents us a great poster sweeping the widest possible range of temperatures to allow us to travel through universe’s thermal diversity. I hope they will sell the poster somewhere.
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The Scale of the Universe
A nice Flash animation that you can play with to get a grasp of the dimensional diversity of our universe. Fly from portion of a yocto-meter to many yotta-meters.
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Electron Microscopy and Music
Vinyl records are a thing of the past, mostly. But it’s still very nice to see how they look when you zoom in with an Electron Microscope. Reckon has a gallery of images that show the finely engraved grooves of a vinyl record. It also shows this video of how a vinyl record was made.…